The first is Counter Clockwise by Jason Cockcroft. This book tells the story of Nathan and his father. Nathan has just lost his mother to an accident and is living with his father in an apartment building that is set to be torn down. But, life for Nathan is anything but normal as his father disappears and Nathan is trying to turn time back to restore his family.
A book that follows a more typical science fiction path is Ender's Game by Orson Scott Card. Here Earth has survived two attacks by an alien race and is gearing up for a third by training the children to fight back. This was also released as a major motion picture in 2013.
Earth Girl by Janet Edwards is a science fiction twist. Humans have discovered the ability to portal from Earth to other planets and those planets are inhabitable. The twist is that some humans are allergic to portal travel and will die within minutes if they try to leave Earth. This book deals with prejudice and equality as well as an imaginary future.
This discussion would not be complete without the mention of two classic science fiction offerings, Star Wars and The Hitchhiker's Guide to the Galaxy. Star Wars titles can be found under several different authors, but all with the same beloved cast of characters. The Hitchhiker's Guide to the Galaxy is written by Douglas Adams. Aliens have been living on Earth and when Earth is the target of destruction, the aliens team up with humans on a trip through the galaxy.