The lovable crime-fighting mutt Scooby Doo teams up with Superman's dog Krypto to fight villains and solve ­mysteries. In these brightly illustrated ­beginning chapter books, Scooby and ­Krypto ­encounter shrink rays, puffin villains, aliens, Lex ­Luther's pet gorilla ­Titano, and even team up with Batman's dog Ace the Bat-Hound in one story. ­Discussion questions, writing prompts, character profiles, and a (­somewhat) deep dive into topics like "what makes a mystery" are included in each text. Young readers will love the opportunity to dive into another aspect of the DC universe and will be delighted to see their favorite dog characters fight crime in each other's stories. ­VERDICT Recommended for collections where superhero stories are popular.