Absorbing, fast-paced sci-fi fantasy hinges on time machine.
Spy romance makes a satisfying end to Jenna Fox Chronicles.
Exhilarating but bloody tale starts off time travel series.
Teen girl finds she's an android in tense sci-fi tale.
Delightful steampunk fantasy about girl spies and assassins.
Fiery, fantastic Cinder sequel ups the action-violence.
Gripping multimedia time-travel adventure series debut.
Complex, thrilling start to thoughtful dystopian trilogy.
Odd mix of cartoony space exploits and cutting-edge science.
Witty sci-fi adventure takes hero to alternate Earths.
Inventive time-travel tale mixes history, religion, sci-fi.
Hugely influential classic mostly for sci-fi fans.
Charming, somewhat silly tale of human-robot rivalry.
Classic undersea adventure with science-fiction flair.