5-2. Harry Potter by J.K. Rowling
So I have listened to all but the last couple of Harry Potter books and I love them. I like them all equally, but I have to say, I love the ending of The Prisoner of Azkaban when it comes to the audiobook ending, though Goblet of Fire will forever be my favorite book in the series.
1. Avalon High by Meg Cabot
I don't know what it is about this book and audiobook, but I can read and listen to it over and over again. I think there was a period where I listened to the audiobook like three times in a row during one break. I don't know, I really love this audiobook. The narrator does an excellent job, I feel like I'm in the story, it's exciting, the list goes on and on. This audiobook is amazing.
The Princess Diaries audiobooks are pretty damn good too.