Hard Science Fiction (79 books)

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1	The Martian by Andy Weir (Goodreads Author) 4.42 avg rating — 1,272,090 ratings score: 346, 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
2	Foundation's Fear (Second Foundation Trilogy, #1) by Gregory Benford 3.85 avg rating — 12,898 ratings score: 288, 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
3	Doomsday Book (Oxford Time Travel, #1) by Connie Willis 4.03 avg rating — 64,448 ratings score: 242, 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
4	The Punch Escrow by Tal M. Klein (Goodreads Author) 3.61 avg rating — 6,128 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
5	The Foundation Trilogy (Foundation, #1-3) by Isaac Asimov 4.42 avg rating — 108,197 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
6	Ibil by Adeerus Ghayan (Goodreads Author) 4.19 avg rating — 42 ratings score: 198, 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
7	Time (Manifold #1) by Stephen Baxter 3.79 avg rating — 8,023 ratings score: 197, 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
8	Space (Manifold, #2) by Stephen Baxter 3.91 avg rating — 5,307 ratings score: 195, 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
9	The Postman by David Brin (Goodreads Author) 3.89 avg rating — 37,317 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
10	2001: A Space Odyssey (Space Odyssey, #1) by Arthur C. Clarke 4.18 avg rating — 334,577 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
11	The Collected Stories of Arthur C. Clarke by Arthur C. Clarke 4.30 avg rating — 6,325 ratings score: 182, 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
12	Ringworld (Ringworld #1) by Larry Niven 3.94 avg rating — 128,405 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
13	Tales of Known Space: The Universe of Larry Niven (Known Space) by Larry Niven 4.19 avg rating — 5,999 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
14	Primary Inversion (Saga of the Skolian Empire, #1) by Catherine Asaro (Goodreads Author) 3.74 avg rating — 4,278 ratings score: 100, and 1 person 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	Space Sucks! by Christina Engela (Goodreads Author) 3.61 avg rating — 23 ratings score: 100, and 1 person 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	The Cage of Zeus by Sayuri Ueda 3.21 avg rating — 161 ratings score: 100, and 1 person 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	When the Earth Had a Moon: Part 1 by A.M. Cunning (Goodreads Author) 3.44 avg rating — 79 ratings score: 100, and 1 person 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	To Honor You Call Us (Man of War, #1) by H. Paul Honsinger (Goodreads Author) 4.13 avg rating — 5,201 ratings score: 100, and 1 person 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	Restricted Fantasies by Kevin Kneupper (Goodreads Author) 3.88 avg rating — 295 ratings score: 100, and 1 person 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	A Fire Within (Sekret Machines #2) by Tom DeLonge (Goodreads Author) 4.07 avg rating — 971 ratings score: 100, and 1 person 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	Fallen World by Simon Emery (Goodreads Author) 4.67 avg rating — 6 ratings score: 100, and 1 person 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	The Day I Killed God by Nick Totem (Goodreads Author) 3.22 avg rating — 18 ratings score: 100, and 1 person 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	An Orbiting Dilemma by Brett Wortham it was amazing 5.00 avg rating — 2 ratings score: 100, and 1 person 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	The Weight of Dusk by Cooper Jacobus (Goodreads Author) 4.67 avg rating — 6 ratings score: 100, and 1 person 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	Dollz by Adeerus Ghayan (Goodreads Author) 4.60 avg rating — 5 ratings score: 100, and 1 person 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	Dark (The Dark Trilogy #1) by Paul L. Arvidson (Goodreads Author) 3.88 avg rating — 200 ratings score: 100, and 1 person 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	Hong on the Range by William F. Wu 3.75 avg rating — 20 ratings score: 100, and 1 person 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	In Times of Peace: Dance of Darkness and Light Episode 1 by The Loneliest Lone Wolf (Goodreads Author) 4.71 avg rating — 7 ratings score: 100, and 1 person 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	The Starseed by Julien Mbayi it was amazing 5.00 avg rating — 3 ratings score: 100, and 1 person 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	Nureeva and Tangora by Adeerus Ghayan (Goodreads Author) it was amazing 5.00 avg rating — 1 rating score: 100, and 1 person 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	Entropy: A Sci-Fi Thriller by L.P. Randazz (Goodreads Author) 3.93 avg rating — 75 ratings score: 100, and 1 person 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	Black Sunrise by Christina Engela (Goodreads Author) 3.73 avg rating — 15 ratings score: 99, and 1 person 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 Naked Sun (Robot, #2) by Isaac Asimov 4.19 avg rating — 63,100 ratings score: 98, and 1 person 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
34	Eon (The Way, #1) by Greg Bear 3.88 avg rating — 30,126 ratings score: 95, and 1 person 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	Slant (Queen of Angels, #4) by Greg Bear 3.64 avg rating — 2,426 ratings score: 94, and 1 person 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	Hammerfall (The Gene Wars, #1) by C.J. Cherryh (Goodreads Author) 3.71 avg rating — 1,768 ratings score: 94, and 1 person 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	Foundation and Chaos (Second Foundation Trilogy #2) by Greg Bear 4.18 avg rating — 26,281 ratings score: 93, and 1 person 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	Timescape by Gregory Benford 3.72 avg rating — 11,523 ratings score: 91, and 1 person 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	Startide Rising (The Uplift Saga, #2) by David Brin (Goodreads Author) 4.04 avg rating — 33,281 ratings score: 89, and 1 person 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	Stories of Your Life and Others by Ted Chiang 4.25 avg rating — 123,862 ratings score: 88, and 1 person 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	The Lifecycle of Software Objects by Ted Chiang 3.91 avg rating — 7,379 ratings score: 87, and 1 person 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
42	Mission of Gravity (Mesklin #1) by Hal Clement 3.90 avg rating — 7,594 ratings score: 84, and 1 person 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 Best of Hal Clement by Hal Clement 3.81 avg rating — 144 ratings score: 83, and 1 person 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
44	The Seeds of Earth (Humanity's Fire, #1) by Michael Cobley 3.42 avg rating — 3,351 ratings score: 82, and 1 person 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 Orphaned Worlds (Humanity's Fire, #2) by Michael Cobley 3.63 avg rating — 1,641 ratings score: 81, and 1 person 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	Edge of Dark (The Glittering Edge, #1) by Brenda Cooper (Goodreads Author) 3.55 avg rating — 598 ratings score: 80, and 1 person 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 Creative Fire (Ruby's Song #1) by Brenda Cooper (Goodreads Author) 3.02 avg rating — 250 ratings score: 79, and 1 person 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	Diaspora by Greg Egan 4.10 avg rating — 11,053 ratings score: 78, and 1 person 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
49	Permutation City by Greg Egan 4.05 avg rating — 12,780 ratings score: 77, and 1 person 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	Neuromancer (Sprawl #1) by William Gibson 3.89 avg rating — 361,371 ratings score: 76, and 1 person 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	Pattern Recognition (Blue Ant, #1) by William Gibson 3.88 avg rating — 52,492 ratings score: 75, and 1 person 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	Pandora's Star (Commonwealth Saga, #1) by Peter F. Hamilton (Goodreads Author) 4.23 avg rating — 53,576 ratings score: 74, and 1 person 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	The Reality Dysfunction (Night's Dawn, #1) by Peter F. Hamilton (Goodreads Author) 4.12 avg rating — 37,969 ratings score: 73, and 1 person 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	Inherit the Stars by James P. Hogan 4.06 avg rating — 5,914 ratings score: 72, and 1 person 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	Red by James Hogan by James Hogan really liked it 4.00 avg rating — 1 rating score: 71, and 1 person 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
56	The Best of Nancy Kress by Nancy Kress (Goodreads Author) 4.29 avg rating — 158 ratings score: 70, and 1 person 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	Paul McDevitt by Paul McDevitt (Artist) 0.00 avg rating — 0 ratings score: 69, and 1 person 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	Spin State (Spin Trilogy, #1) by Chris Moriarty (Goodreads Author) 3.79 avg rating — 2,527 ratings score: 68, and 1 person 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	The Inquisitor’s Apprentice (Inquisitor's Apprentice, #1) by Chris Moriarty (Goodreads Author) 3.59 avg rating — 1,039 ratings score: 67, and 1 person 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	First Light (The Red, #1) by Linda Nagata (Goodreads Author) 3.77 avg rating — 3,598 ratings score: 66, and 1 person 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	The Bohr Maker (The Nanotech Succession, #1) by Linda Nagata (Goodreads Author) 3.91 avg rating — 1,771 ratings score: 65, and 1 person 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	The Quantum Thief (Jean le Flambeur, #1) by Hannu Rajaniemi 3.83 avg rating — 23,786 ratings score: 62, and 1 person 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 Fractal Prince (Jean le Flambeur, #2) by Hannu Rajaniemi 4.04 avg rating — 9,224 ratings score: 61, and 1 person 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
64	The Causal Angel (Jean le Flambeur, #3) by Hannu Rajaniemi 4.20 avg rating — 5,744 ratings score: 60, and 1 person 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	Revelation Space (Revelation Space, #1) by Alastair Reynolds 3.99 avg rating — 61,320 ratings score: 59, and 1 person 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	House of Suns by Alastair Reynolds 4.24 avg rating — 32,305 ratings score: 58, and 1 person 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
67	The Best of Kim Stanley Robinson by Kim Stanley Robinson 3.82 avg rating — 380 ratings score: 57, and 1 person 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	Software (Ware, #1) by Rudy Rucker 3.74 avg rating — 4,354 ratings score: 56, and 1 person 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
69	Flashforward by Robert J. Sawyer (Goodreads Author) 3.66 avg rating — 16,847 ratings score: 55, and 1 person 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	Sun of Suns (Virga, #1) by Karl Schroeder 3.75 avg rating — 2,630 ratings score: 54, and 1 person 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	Aftermath (Supernova Alpha, #1) by Charles Sheffield 3.51 avg rating — 801 ratings score: 53, and 1 person 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	A Fire Upon the Deep (Zones of Thought, #1) by Vernor Vinge 4.13 avg rating — 66,253 ratings score: 52, and 1 person 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
73	The Collected Stories of Vernor Vinge by Vernor Vinge 3.97 avg rating — 1,168 ratings score: 51, and 1 person 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	Blindsight (Firefall, #1) by Peter Watts (Goodreads Author) 4.01 avg rating — 53,214 ratings score: 50, and 1 person 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
75	The Egg by Andy Weir (Goodreads Author) 4.21 avg rating — 37,428 ratings score: 48, and 1 person 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	The Best of Connie Willis: Award-Winning Stories by Connie Willis 4.10 avg rating — 2,275 ratings score: 46, and 1 person 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	Spin (Spin, #1) by Robert Charles Wilson 4.04 avg rating — 44,219 ratings score: 45, and 1 person 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	The Traffic Stoppers Case (A Tony and Mindy Mystery Book 1) by Rod Sterling 3.50 avg rating — 2 ratings score: 44, and 1 person 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 Case of the Yearbook Murders (A Tony and Mindy Mystery 2) by Rod Sterling 0.00 avg rating — 0 ratings score: 43, and 1 person 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