Penguin presents the audiobook edition of Jack of Hearts (And Other Parts) by L.C. Rosen, read by Drew Caidan.

My first time getting it in the butt was kind of weird. I think it's going to be weird for everyone's first time, though.
Jack Rothman is seventeen. A solid student with a talent for art, he likes partying, makeup and boys. Sometimes all at the same time. His active, unashamed sex life makes him a red hot topic for the high school gossip machine, but Jack doesn't really care too much about what the crowd is saying about him. His mantra is: 'It could be worse.'
And then it is.
When Jack starts writing a teen sex advice column for his best friend's website, he begins to receive creepy and threatening love letters. His 'admirer' is obsessed with Jack - they know who he's hanging out with, who he's sleeping with, who his mum is dating. And while they say they love Jack, they don't love his lifestyle. They want him to curb his sexuality and personality. And if he won't, they will force him.
As his stalker starts to ratchet up the pressure, it's up to Jack and his friends to uncover their identity, before their love becomes genuinely dangerous.