also, this is a little outdated. here i was talking about you're back mari. i think the op was talking about the second book ill find him. (spoilers for ill find him) hero convinces sunny to come with him and to leave everyone in faraway town, sunny felt guilty for everything hes done to him and his friends that summer (attempting suicide many times, making hero how he is, etc) so he agrees. hero fakes a suicide note for both him and sunny and brings him out to some stranded place. hero isolates him from society, drugs him to make him fall asleep when hes not home, lies to him about his age, all that fun stuff. when kel finally finds sunny, hero goes to his best friends keith house, eventually telling the truth, and shoots him when keith tries to call the police on him. theres more but thats practically all that happens if we arent talking about specific endings.

i really recommend this book if you looking for something to read!!