The thickest book is a collection of books 1,2,3 and 4. It has some sticker residue on the cover, but the pages are mostly fine. Book five is fine besides a sticker on the cover, and book six has a lot of crusty residue on the cover. Seven has some peeling on the edges of the cover, and eight has dime stickers, dirt, and the cover is pretty crusty. The standalone books’ pages are all quite alright. They all have a stamp on the inside of their covers.