20th Century YA and Middle Grade Science Fiction (613 books)

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Listopia > 20th Century YA and Middle Grade Science Fiction

This list is for YA and middle grade science fiction published in the 20th century.

No fantasy! Science fiction only, encompassing futuristic, dystopian, post-apocalyptic, and space themed stories. Books on this list must be published for the YA and middle grade market.

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1	A Wrinkle in Time (Time Quintet, #1) by Madeleine L'Engle 3.97 avg rating — 1,313,706 ratings score: 1,693, and 18 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
2	The Giver (Giver, #1) by Lois Lowry (Goodreads Author) 4.12 avg rating — 2,907,398 ratings score: 1,264, and 13 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
3	Ender’s Game (Ender's Saga, #1) by Orson Scott Card 4.31 avg rating — 1,505,111 ratings score: 1,090, and 11 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
4	Mrs. Frisby and the Rats of NIMH (Rats of NIMH, #1) by Robert C. O'Brien 4.17 avg rating — 187,902 ratings score: 559, and 6 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
5	Enchantress from the Stars (Elana, #1) by Sylvia Engdahl (Goodreads Author) 3.95 avg rating — 4,265 ratings score: 529, and 6 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
6	Escape to Witch Mountain by Alexander Key 3.91 avg rating — 3,694 ratings score: 472, and 5 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
7	The Tripods Trilogy (The Tripods, #1-3) by John Christopher 4.21 avg rating — 3,110 ratings score: 444, and 5 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
8	A Wind in the Door (Time Quintet, #2) by Madeleine L'Engle 3.98 avg rating — 134,332 ratings score: 422, and 5 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
9	This Time of Darkness by Helen Mary Hoover 4.30 avg rating — 715 ratings score: 391, and 4 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
10	A Wrinkle in Time Quintet (A Wrinkle in Time Quintet, #1-5) by Madeleine L'Engle 4.32 avg rating — 5,781 ratings score: 388, and 4 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
11	The Girl Who Owned a City by O.T. Nelson 3.78 avg rating — 5,552 ratings score: 378, and 4 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
12	The Forgotten Door by Alexander Key 4.11 avg rating — 2,851 ratings score: 376, and 4 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
12	Gathering Blue (Giver, #2) by Lois Lowry (Goodreads Author) 3.83 avg rating — 216,008 ratings score: 376, and 4 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
14	Anna to the Infinite Power by Mildred Ames 3.95 avg rating — 642 ratings score: 362, and 4 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
15	A Swiftly Tilting Planet (Time Quintet, #3) by Madeleine L'Engle 4.07 avg rating — 112,931 ratings score: 327, and 4 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
16	The White Mountains (The Tripods, #1) by John Christopher 3.95 avg rating — 15,119 ratings score: 324, and 4 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
17	Searching for Lucky #3002: A Ben and Blue Mystery by Ellen Melissa Cohen 4.74 avg rating — 38 ratings score: 300, and 3 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
18	This Place Has No Atmosphere by Paula Danziger 3.85 avg rating — 1,814 ratings score: 292, and 3 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
19	Podkayne of Mars by Robert A. Heinlein 3.67 avg rating — 9,722 ratings score: 290, and 3 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
20	A Tale of Time City by Diana Wynne Jones 3.86 avg rating — 5,534 ratings score: 287, and 3 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
20	The Last Book in the Universe by Rodman Philbrick 3.91 avg rating — 10,430 ratings score: 287, and 3 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
22	Out of the Silent Planet (The Space Trilogy, #1) by C.S. Lewis 3.94 avg rating — 112,005 ratings score: 284, and 3 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
23	Children of the Dust by Louise Lawrence really liked it 4.00 avg rating — 2,298 ratings score: 279, and 3 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
24	The Rolling Stones by Robert A. Heinlein 3.89 avg rating — 7,999 ratings score: 277, and 3 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
25	The Silver Metal Lover (Silver Metal Lover, #1) by Tanith Lee 4.04 avg rating — 4,346 ratings score: 273, and 3 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
26	Brother in the Land by Robert Swindells 3.96 avg rating — 1,586 ratings score: 271, and 3 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
27	Have Space Suit—Will Travel by Robert A. Heinlein 3.93 avg rating — 31,714 ratings score: 270, and 3 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
28	Empty World by John Christopher 3.83 avg rating — 1,032 ratings score: 269, and 3 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
29	Jumper (Jumper, #1) by Steven Gould (Goodreads Author) 3.93 avg rating — 16,476 ratings score: 268, and 3 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
30	The Girl with the Silver Eyes by Willo Davis Roberts 4.02 avg rating — 10,936 ratings score: 267, and 3 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
31	Among the Hidden (Shadow Children, #1) by Margaret Peterson Haddix 3.99 avg rating — 133,402 ratings score: 266, and 3 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
32	Journey Between Worlds by Sylvia Engdahl (Goodreads Author) 3.65 avg rating — 182 ratings score: 264, and 3 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
33	When the Tripods Came by John Christopher 3.81 avg rating — 4,970 ratings score: 240, and 3 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
33	The Keeper of the Isis Light (Isis, #1) by Monica Hughes 3.86 avg rating — 1,427 ratings score: 240, and 3 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
35	Z for Zachariah by Robert C. O'Brien 3.68 avg rating — 18,337 ratings score: 237, and 3 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
36	The Iron Giant by Ted Hughes 3.86 avg rating — 13,220 ratings score: 226, and 3 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
37	The Wonderful Flight to the Mushroom Planet (The Mushroom Planet, #1) by Eleanor Cameron 4.03 avg rating — 2,646 ratings score: 222, and 3 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
38	Lizard Music by Daniel Pinkwater 4.15 avg rating — 2,292 ratings score: 209, and 3 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
39	The City of Gold and Lead by John Christopher 4.09 avg rating — 9,372 ratings score: 206, and 3 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
40	Beyond the Dark River by Monica Hughes 3.54 avg rating — 24 ratings score: 203, and 3 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
41	Rite of Passage by Alexei Panshin 3.81 avg rating — 3,825 ratings score: 200, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
41	Neuroniac (1) by Jan Dragotta (Goodreads Author) it was amazing 5.00 avg rating — 121 ratings score: 200, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
43	The Domes of Mars (Maurice Gray, #2) by Patrick Moore 3.83 avg rating — 6 ratings score: 199, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
43	A Princess of Mars (Barsoom, #1) by Edgar Rice Burroughs 3.81 avg rating — 61,683 ratings score: 199, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
45	The Martian Tales Trilogy (Barsoom #1-3) by Edgar Rice Burroughs 4.05 avg rating — 10,136 ratings score: 192, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
46	The Green Book by Jill Paton Walsh 3.68 avg rating — 1,837 ratings score: 191, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
47	The Runaway Robot by Lester del Rey 4.02 avg rating — 524 ratings score: 190, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
48	The Space Ship Under the Apple Tree by Louis Slobodkin 4.08 avg rating — 207 ratings score: 189, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
48	Kindred by Octavia E. Butler 4.31 avg rating — 295,721 ratings score: 189, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
50	The Alliance by Gerald N. Lund (Goodreads Author) 4.21 avg rating — 4,620 ratings score: 186, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
51	Ray Bradbury's The Martian Chronicles: The Authorized Adaptation (Ray Bradbury Graphic Novels) by Dennis Calero (Illustrator) 3.75 avg rating — 833 ratings score: 184, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
52	Winter of Fire by Sherryl Jordan 4.32 avg rating — 2,741 ratings score: 182, and 3 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
53	An Acceptable Time (Time Quintet, #5) by Madeleine L'Engle 3.77 avg rating — 24,449 ratings score: 180, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
54	The Isis Trilogy by Monica Hughes 4.20 avg rating — 56 ratings score: 177, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
55	The Hermit Thrush Sings by Susan Butler 4.14 avg rating — 463 ratings score: 176, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
55	Children of Morrow by Helen Mary Hoover 4.16 avg rating — 279 ratings score: 176, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
57	Off the Road by Nina Bawden 2.99 avg rating — 77 ratings score: 174, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
58	The Ennead by Jan Mark 3.27 avg rating — 49 ratings score: 173, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
59	Sprockets: A Little Robot by Alexander Key 4.46 avg rating — 39 ratings score: 172, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
60	The Far Side of Evil (Elana, #2) by Sylvia Engdahl (Goodreads Author) 3.98 avg rating — 573 ratings score: 171, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
61	But We Are Not of Earth by Jean E. Karl 4.18 avg rating — 100 ratings score: 167, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
62	Alan Mendelsohn, the Boy from Mars by Daniel Pinkwater 4.35 avg rating — 1,062 ratings score: 166, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
63	The Last Children by Gudrun Pausewang 3.92 avg rating — 1,168 ratings score: 165, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
63	Eva by Peter Dickinson 3.43 avg rating — 2,297 ratings score: 165, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
65	Moon of Three Rings (Moon Magic, #1) by Andre Norton 3.96 avg rating — 927 ratings score: 163, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
66	The Cure by Sonia Levitin 3.83 avg rating — 908 ratings score: 160, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
66	The Ear, the Eye, and the Arm by Nancy Farmer (Goodreads Author) 3.87 avg rating — 16,490 ratings score: 160, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
68	Children of Time by Deborah Moulton 3.97 avg rating — 38 ratings score: 159, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
68	Star Born (Pax/Astra, #2) by Andre Norton 3.91 avg rating — 1,743 ratings score: 159, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
70	A Rag, a Bone and a Hank of Hair by Nicholas Fisk 4.04 avg rating — 214 ratings score: 158, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
71	Journey Outside by Mary Q. Steele 3.69 avg rating — 331 ratings score: 153, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
72	Found by June Oldham 3.31 avg rating — 103 ratings score: 150, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
72	Star Dog by A.M. Lightner 4.05 avg rating — 110 ratings score: 150, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
74	Futuretrack 5 by Robert Westall 3.97 avg rating — 231 ratings score: 147, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
74	Galax-Arena by Gillian Rubinstein 3.81 avg rating — 788 ratings score: 147, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
76	Those Who Fall from the Sun by Josephine Rector Stone 3.33 avg rating — 3 ratings score: 146, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
77	Return from Witch Mountain by Alexander Key 3.80 avg rating — 611 ratings score: 143, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
78	Out There by Adrien Stoutenburg really liked it 4.00 avg rating — 11 ratings score: 142, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
79	The Other Side of the Sun by Madeleine L'Engle 3.86 avg rating — 2,318 ratings score: 140, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
80	Invitation to the Game by Monica Hughes 3.79 avg rating — 5,733 ratings score: 137, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
81	Star Man's Son, 2250 A.D by Andre Norton 4.02 avg rating — 2,669 ratings score: 133, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
82	The City Beyond the Gates by N. Roy Clifton 3.89 avg rating — 9 ratings score: 128, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
83	Outside by Andre Norton 3.83 avg rating — 105 ratings score: 127, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
84	Why Weeps the Brogan? by Hugh Scott (Author and Illustrator) 3.76 avg rating — 34 ratings score: 126, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
85	David Starr, Space Ranger (Lucky Starr, #1) by Paul French (Pseudonym) 3.71 avg rating — 3,999 ratings score: 124, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
86	The Dying Sun by Gary L. Blackwood (Goodreads Author) 4.07 avg rating — 15 ratings score: 123, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
87	Matthew Looney's Voyage to the Earth (Matthew and Maria Looney, #1) by Jerome Beatty Jr. 4.19 avg rating — 102 ratings score: 121, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
88	Tom Swift and His Flying Lab (Tom Swift Jr., #1) by Victor Appleton II 3.83 avg rating — 642 ratings score: 120, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
88	Lucky Starr and the Pirates of the Asteroids (Lucky Starr, #2) by Isaac Asimov 3.67 avg rating — 2,464 ratings score: 120, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
90	Lucky Starr and the Big Sun of Mercury (Lucky Starr, #4) by Isaac Asimov 3.67 avg rating — 2,060 ratings score: 119, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
90	Matthew Looney's Invasion of the Earth (Matthew and Maria Looney, #2) by Jerome Beatty Jr. 4.07 avg rating — 67 ratings score: 119, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
90	Lucky Starr and the Oceans of Venus (Lucky Starr, #3) by Isaac Asimov 3.67 avg rating — 2,053 ratings score: 119, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
93	The Tomorrow City by Monica Hughes 3.68 avg rating — 175 ratings score: 118, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
94	Portal to E'ewere by Irma Walker really liked it 4.00 avg rating — 15 ratings score: 117, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
95	Lucky Starr and the Moons of Jupiter (Lucky Starr, #5) by Isaac Asimov 3.73 avg rating — 1,808 ratings score: 116, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
95	The Rings of Saturn (Lucky Starr, #6) by Paul French (Pseudonym) 3.73 avg rating — 1,685 ratings score: 116, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
97	Matthew Looney and the Space Pirates (Matthew and Maria Looney, #4) by Jerome Beatty Jr. 4.15 avg rating — 46 ratings score: 115, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
98	Encounter Near Venus by Leonard Wibberley 4.19 avg rating — 26 ratings score: 114, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
99	Obernewtyn (The Obernewtyn Chronicles, #1) by Isobelle Carmody (Goodreads Author) 3.97 avg rating — 12,637 ratings score: 108, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
100	Tomorrow, When the War Began (Tomorrow, #1) by John Marsden 4.04 avg rating — 62,055 ratings score: 106, and 2 people voted	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars