Despite its title, DARK EMPEROR is really a lovely nature book done in rhyme with nonfiction sidebars.
Maybe what you are looking for would be something along the lines of:
The Legend of the Jersey Devil (Trinka Noble, Sleeping Bear Press)
Creepy Carrots (Aaron Reynolds, Simon and Schuster)
The Bones of Fred McFee (Eve Bunting, Harcourt)
Your Skeleton is Showing (Kurt Cyrus, Hyperion)
Scarum Fair (Jessica Swaim, Wordsong)