Rippler by Cidney Swanson
Over Three Weeks on the Amazon Teen Bestseller List.
When Samantha Ruiz turns invisible in front of team mates on a rafting trip,
she knows something's wrong with her. According to her knowledgeable
friend Will, she's got a rare genetic disorder. Fearing a lifetime
sentence as a lab-rat, Sam wants to keep her ability secret. But she
also wants to know if there's a connection between dark Nazi experiments
on others like her and her own mother's death eight years earlier. At
the same time that Sam is sleuthing, she's falling hard for Will. And
soon, she'll have to choose between keeping her secrets hidden and
keeping Will safe.