I fell instantly in love with the work of Dutch illustrator Friso Henstra when I came upon one of his books for sale on etsy. I am particularly fond of his work from the 1970's where psychedelia seemed to have an influence on him.
During this prolific time he often partnered with author Jay Williams and I have excitedly ordered a couple of these books from, where else, amazon used. While he's not quite a household name, there are a few places on line to enjoy his work. Here is a blog entry about a few of his titles, and abebooks features many for sale along with images. They rather remind me of Maurice Sendak meets Terry Gilliam's animations from Monty Python. Great stuff.