How do I know? Well, I've read a black and white galley of it, although I'll hold off on penning an actual, for-serious, review-review until it's August release.
In the meantime, please allow me to present the following evidence. Not only does Johnny Boo, The Best Little Ghost in the World's pet/friend Squiggle (who is also a ghost) unleash squiggle power, he unleashes it harder than ever before.
Everything's better when it's extreme, right? (With the possible exceptions of The X-Men, Justice League and G.I. Joe, of course).
You can read the first six pages of Johnny Boo and The Happy Apples here.