Not every picture book is for younger children, though. This looks like one that would probably have its largest appeal for the sort of 5-8 group.

And, hey, I used to be a children's librarian and would test out books on them! Not ones I thought were disturbing with five year olds, but I used to have a lot of fun with showing 9-11s (who believed they'd gone beyond picture books), The Shape Game or The Wolves in the Walls and things. :-)