Your favourite books with unreliable narrators

Hi All,
today I saw a post on Instagram about how difficult it is to write a GOOD unreliable narrator; like where all throughout reading you think the MC is a good guy but! it turns out they were the villain all along! I don't think I've ever really read a book like that, so I was wondering what YOUR favourite (books with) unreliable narrators are and why 👀🤭