The Book About Moomin, Mymble and Little My

A 1001 CBYMRBYGU. From page to page, the author hooks the child in by having the reader try to anticipate what will happen next. And what happens next is always delightfully unexpected.
This has to be one of the oddest books I've read. Maybe I am trying too hard to figure out what these creatures are instead of just enjoying them for what they do. I like it despite its oddness.