Caldecott Medalist, National Book Award Winner, and New York Times bestselling creator Dan Santat returns to Sidekicks! This expanded edition includes a brand-new cover and sixteen pages of a never-before-seen epilogue! Suit up for high-octane action and laughs!

Captain Amazing, the hometown hero of Metro City, is searching for a sidekick!

Heroes near and far are auditioning for the part, but there's four unlikely candidates heating up the competition. A dog, a cat, a hamster, and a chameleon -- the adoring pets of Captain Amazing's alter ego, Harry -- have all been honing their own secret superpowers. Wanting to spend more time with their beloved human, each pet is vying for the coveted role.

Meanwhile, Captain Amazing's longtime nemesis, Dr. Havoc, is back, and Captain Amazing can't defeat him on his own. With the citizens of Metro City in danger, can the warring pets put their squabbles aside to save the day?!