K.R. Vanderport 
Maggie and Elliot Defy Gravity [EPUB ebook] 

Nothing brings a family together like a serial killer.

Elliot loves his adopted family, but he’s always had some questions about where he came from – especially considering the strange abilities he was born with. Taking advantage of a suspicious opportunity to learn more has positive and negative consequences. On one hand, Elliot finally gets to meet his twin sister, Maggie. On the other, there’s now someone trying to kill them – someone with gifts as unnatural and powerful as their own.