In the novel, Twain's original Tom and Huck have been reincarnated as the feline familiars to a witch. Even though they long to be boys again, they also love having magical powers and being 'adventuresome.' And when Lady Bastet loses her powers, they help her and two werewolves run a haunted Bed and Breakfast called The Chancery House:
Publication Date: June 2011
Because Twain can be read and enjoyed by both younger folk and adults, there will actually be two editions of the novel--one for those who don't necessarily need parential guidance, and one for young readers.
This cover is for the adult version: