Book ID: YA involving space and time travel
31363
A girl who transcends time
127124
Looking for a book about the moon being a spaceship with an AI
68150
Looking for a novel with a ship crewed only by children, on a return trip in space to re-populate Earth when they return
129715
Looking for a book featuring a soldier/marine travelling to a different time/universe
115249
Story involving young female space travelling escapee with multiple personalities
87095
Sci-fi novel involving living forever through teleporter copies
17303
Young adult book about a boy(?) who gets sent through a portal to another world which is really the distant future
11855
Hunger games style alien book
93979
Help Identifying a Sci-Fi Book: Humans transported to alien world and given tasks to escape
61906
I am looking for an older series about space colonization
126872
70s YA novel about two boys travelling millions of years into the past, meeting a "cynogasaurus" and rival animal-themed caveman tribes
55772
Time/space traveling story where a person travels through a portal in the London Underground
74443
YA Time travel/teleportation novel. Plot required using helmet (or other head gear)
91051
Older science fiction book about time travel to retrieve things but they went sideways through the dimensions instead
94948
Book about time portals inside an asteroid in Earth orbit
110527
Sci-Fi novel that involves mind backups and (small) group minds
76070
Novel about people living in a virtual reality on a spaceship, only discovering this over time