Currently giving The One by John Marrs a go. 

A decade after scientists discover everyone has a gene they share with just one other person, millions have taken the test (a simple DNA mouth swab) to find true love with THE ONE… 

Except what if you’re paired with someone in another country? Or a gender you’re not attracted to? Maybe he’s 30 years your senior? What if she’s total psychopath? Do you care if they’re married? What if you’re married?! 

I love stuff like this. Only a chapter in so no idea if its good or rubbish yet.