Terrance Dicks is best known for writing dozens of novelisations of Doctor Who stories, generally at around 128 pages and full of lurid chapter titles like "Escape to Danger". But he also wrote a huge number of original books for children and younger readers - these also tended to weigh in at around 128 pages. He got a whole generation of kids reading. And all in addition to an extensive career in television writing and script-editing. The man was a legend.
His Star Quest trilogy is pretty obscure these days, and clearly an attempt at a bit of a Star Wars cash-in, using many tropes familiar from the author's Doctor Who work. Starjack is a quest story that sees teenage cousins Kevin and Jan abducted from 20th century Stonehenge by space baddies (the Kaldor), while a third cousin Anna pursues them across the galaxy with a giant (Garm), dwarf (Tell), and octopus (Osar). Kevin is British, Jan is American, and Anna is Swedish, but after giving their surprisingly lengthy family backstory, these details are quietly forgotten after the opening chapter.
Alien cities, deadly monsters, clone armies, ancient civilisations, and officious robots are soon encountered. Often quite briefly.
Clearly, the book is flimsy nonsense. But it's written with total conviction, a simple story, told well, by an absolute master. Amid the Star Wars knockoffery, it even kind of predicts Ewoks, which is possibly a dubious honour, but there we go. Breathless pulp adventure that doesn't let up until the final page.