Clean YA Sci-Fi

Try these books if you're looking for:

• clean
• sci-fi
• young adult/teen

Matched
By Ally Condie
YA F CONDIE Matched #1
Cassia has always trusted the Society to make the right choices for her, so when Xander appears on-screen at her Matching ceremony, Cassia knows he is her ideal mate--until Ky Markham's face appears for an instant before the screen fades to black.

Across the Universe
By Beth Revis
YA F REVIS
Amy, a cryogenically frozen passenger aboard the vast spaceship Godspeed, is nearly killed when her cryo chamber is unplugged fifty years before their scheduled landing.

Incarceron 
By Catherine Fisher
YA F FISHER
To free herself from an upcoming arranged marriage, Claudia, the daughter of the Warden of Incarceron, a futuristic prison with a mind of its own, decides to help a young prisoner escape.