The One by John Marrs

A decade after scientists discovered that everyone’s DNA contains one gene they share with only one other person, millions have taken the test to find their genetic soul mates.
With a single swab, five people’s lives are about to change as they find the one person they are meant to be with… And uncover shocking, deadly, secrets.

Big Little Lies by Liane Moriarty

Madeline is a force to be reckoned with. Celeste is royalty among the parent crowd. The two take a new to town, single mom under their wing, none of them realizing how the arrival of Jane and her little boy will affect them all. And there’s the murder. Or was it an accident? What’s indisputable is that someone is dead. But who did what?