If I Stay has genre Young-adult fiction. Young-adult fiction has examples: The Sea of Monsters
[Human]:  If I Stay was such a great book! Can you recommend something similar? [Assistant]: The True Confessions of Charlotte Doyle is an example and Young-adult fiction, The Sea of Monsters, The Golden Lily and  Paper Towns are also Young-adult fiction genres. Is there any particular genre you need? [Human]: Yes I love young-adult fiction bit I have actually read those. Can you name something else? 
How about  Under the Never Sky,  Un Lun Dun, Uglies and Tricks, have you read these?