If you're interested in myth-related material, check out Rick Riordan's stuff: Percy Jackson and the Olympians. They're fun, kid-friendly books that are based on mythological creatures. Actually, even being an adult, I kind of dig them.
I think that my favorite is likely the one involving Jason, heir to the throne of Iolkus. His quest for the golden fleece is intense and fascinating. It's also amazing how many great heroes were amongst the Argonauts! They had such amazing adventures together!