"What if you woke up one morning and could turn invisible? Would you fight crime? Save the world? If you're like Leopold, you'd rather play tricks on your big sister and steal her caramels! But being invisible isn't all it's cracked up to be. Leopold can make his body disappear, but not his clothes. How will he pull his pranks with his pajamas showing? Is he brave enough to play his tricks in the nude? Maybe the right magic word is all he needs!

Sherlock Holmes has always been the smartest man in the room, until now. There is a new criminal mastermind at large, Professor James Moriarty, and not only is he Holmes's intellectual equal, but his capacity for evil, coupled with a complete lack of conscience, may give him an advantage over the renowned detective. Holmes's investigation into Moriarty's plot becomes more dangerous as it leads him and Watson out of London to France, Germany, and finally...