Pre-2011 sci fi adventure book (series?) starring a young female protagonist who visits an alien market with her younger sibling
67824
Book about a boy who travels to a parallel universe to get a book
89706
Title/author of novel(s?) about society where children learn alien languages?
5178
Novel with an alien rabbit invasion
118194
Looking for the title of a book about alien invasion, mining asteroids and using lasers to defend earth
109238
Early 90s YA novel about a kid into special FX who meets an (animatronic, yet possibly alive) dragon
79207
YA novel about sister is alien with two hearts and assassins come
118033
Title of novel with girl who can read minds by observing body language, later communicates with a hive mind on an alien planet's surface
125684
2000s fantasy book with a red-haired protagonist meeting companions from her previous life, including a troll
141480
Help identifing a book about people exiled to the distant past
65801
Looking for name of a book-series - Spaceship crashed, Civilization based on Magic rebuilt
127337
Late 70s Early 80s Children's SF Book Series
80328
YA novel - kid finds some kind of time traveling creature
129715
Looking for a book featuring a soldier/marine travelling to a different time/universe
29380
YA series with a housekeeper or protector robot and set on a planet with a harsh sun
29033
Eighties post-apocalyptic book series with teleporters
151289
90/80s young adult sci-fi tv show: young girl turns out to be alien princess (or some such)
90817
Need help finding a specific Scifi trilogy, 2000-2004