Dot and Tot of Merryland - L. Frank Baum

Dot and Tot of Merryland is a 1901 novel by L. Frank Baum. After Baum wrote The Wonderful Wizard of Oz, he wrote this story about the adventures of a little girl named Dot and a little boy named Tot in a land reached by floating on a river that flowed through a tunnel. The land was called Merryland and was split into seven valleys. (Summary by Wikipedia)