Even Superman needs a loyal sidekick. But how did Krypto the Super-Dog become the Man of Steel's best friend? Discover the origin of this superpowered Super-Pet in the this action-packed, POW!-WHAM!-BOOM! chapter book for early readers. action-packed story tells how Ace became the Dark Knight's loyal bat-hound.

The world's greatest heroes are back in action--except Batman is missing! While Superman helps clean up Gotham City, Wonder Woman searches outer space to find the Dark Knight. Her journey brings her closer to Batman, but can she uncover the truth behind his disappearance?

Superman trains his young sidekicks to become super heroes, Bizarro comes to Earth and makes a mess of Metropolis, and Jimmy Olsen finds out that being Superman's pal means help is only a shout away.

The Fearsome Five have arrived, and they want the playground where all the Super Kids play.

When the evil Kroc hatches a plan to steal the Earth's water, Plastic Frog sets out to track him down and return the bodies of water to their rightful places.

When Swamp Thing is called away to help with a fire elsewhere, Solomon Grundy and his zombie pets decide to take over the swamp--and it is up to Ace the Bat-Hound and the Swamp-Pets to repel the invasion.

Even Batman needs a crime-fighting canine by his side. But how did Ace become the Dark Knight's loyal Bat-Hound? Discover the origin of this superpowered Super-Pet in this action-packed, POW!-WHAM!-BOOM! chapter book for early readers.

Even Supergirl needs a furry friend. But how did Streaky become her Super-Cat? Discover the origin of this super powered Super-Pet in this action-packed, POW!-WHAM!-BOOM! chapter book for early readers.

The villain Scarecrow's servants, the Scaredy Crows, are coating Gotham City with fear dust, and it is up to Ace the Bat-Hound to find a way to save Halloween for the city's children.