Johnny Boo is the best little ghost in the whole world, because he's got Boo Power. This means that he can go "BOO" really loudly. His pet ghost, Squiggle, has Squiggle Power, which means that he can fly and do really fast loop-the-loops. Together they have the world's greatest ghost adventures! When the giant pink and yellow Ice Cream Monster bumbles into their lives, they go into a mad panic... until they discover that he's actually quite friendly.

Johnny Boo has "boo" power and his pet ghost Squiggle has "squiggle" power. But which is better? And might there be a power that is greater than them both? Wiggle power? Giggle power? Squiggle goes on a quest to learn the secret of twinkle power from the twinkling stars, but doesn't have much luck. Instead, a strange and hilarious secret is discovered about Johnny Boo's hair.

The full-color, all-ages hit series returns! In this adventure, Johnny Boo has been eating a little too much ice cream, and now his muscles have gotten all floppy and droopy. Why, they're positively floopy! Meanwhile, our friend the Ice Cream Monster has changed his gluttonous ways and now has big strong muscles, thanks to his new favorite food: apples! Terribly embarrassed by his own puny muscles, Johnny Boo sets out on a quest to find some happy apples that can give him strong happy muscles. But it won't be easy... especially if the Ice Cream Monster mistakes him for a delicious ice cream cone! And is that a television inside the monster's belly!?

James Kochalka’s beloved, all-ages series continues with another goofy romp! When Johnny Boo announces a play date with his quiet new friend Rocky the Rock, trusty sidekick Squiggle is left to find a new friend of his own. How about this nice fellow named the Mean Little Boy? He sure is fond of his butterfly net, and he’s got a great game to play with Squiggle… but, wait a minute, maybe the Mean Little Boy isn’t actually so nice! It’s up to Johnny Boo and Squiggle to find a way out of this pickle.

What does Johnny Boo do when there's nothing to do? Johnny Boo Does Something! In fact, he does a LOT of things! Watch Johnny Boo have a Boring Adventure and discover Yawn Power, write an angry letter to Ice Cream Magazine, get a squiggly new hairdo, fall to the bottom of Ice Cream Hole #25, and celebrate the maybe-birthday of his pet ghost Squiggle, all adding up to the most inventive Johnny Boo book yet!

When asked what adventure Johnny Boo should go on next, many readers wanted him to visit the moon. Others wanted him to ride a skateboard. Well, dreams do come true! Also moon ice cream, a new monster, and the mighty Boom Power of new friend Susie Boom!