Blue's Clues Season 4 Episode 15 Blue's Book Nook Episode Title:Blue's Book Nook.Episode Description: Blue has her own book nook where she's organized her books into sections. We read some of the books and also help out some of the characters to find books that they need to help them out with things. Later, we visit the library, where Marlee the librarian helps Steve to find a book about elephants. We learn about reading, categories, classification, the alphabet and more.