Looks like the audiobook got created separately, and several times.. The attached ISBN is the main mass market paperback edition everything should be attached to. Below I'm linking the various strays. Additionally, it looks like some of the editions got the series name put in the title instead of in the series field by accident. Audiobook: https://www.goodreads.com/book/show/1... Audiobook: https://www.goodreads.com/book/show/1... Audiobook: https://www.goodreads.com/book/show/1...
Audiobook: https://www.goodreads.com/book/show/1...
Audiobook: https://www.goodreads.com/book/show/1...
Audiobook: https://www.goodreads.com/book/show/1...