A law officer's work is never done, and Dog Man is back at it in this fourth book of the series. Petey the Cat's clone, Li'L Petey, is living with Dog Man as a son, but wonders deep down if he can escape the evil influence of his own genetics. Dog Man and Cat Kid begins with an elderly cat-sitter offering to take care of Li'L Petey while Dog Man goes to work. "Mrs. Suspicionflame" seems harmless, and Li'L Petey is comfortable with her. But only Li'L Petey recognizes the sitter's true identity: it's Petey, and he has a plan for vengeance on Dog Man. He wants to rig up 80-HD, Li'L Petey's robot programmed to obey the clone cat, and use it as a mega-weapon. Li'L Petey doesn't want to disappoint his Papa, but will he go along with this illegal scheme?
At the police station, Hollywood director Sam Hamilton proposes an idea for a feature film about Dog Man's adventures. Chief is thrilled, but Hamilton has doubts when he sees how unfocused Dog Man can be. Is this eccentric cop fit to have a movie honoring him? Chief promises Dog Man will behave, and the director accepts his word for now. He introduces Italian actress Yolay Caprese to Dog Man; she'll be a star of the film. Yolay adores Dog Man, and loves rubbing his tummy. The movie is a go, but what's happening back at the dog house with Li'L Petey and his Papa?
The younger cat doesn't want to be involved in crime, but Petey won't let him off that easily. His clone is made of the same stuff he is; he has to be bad. Why, Li'L Petey has broken a few laws just today, including abetting his progenitor. When Li'L Petey wavers in his commitment to goodness, his Papa is there to redirect him toward duplicity. Disguised as Mrs. Suspicionflame, Petey visits Gassy Behemoth Studios with his clone, where filming has commenced on the Dog Man movie. They infiltrate the dressing room and steal high-tech costumes. Meanwhile, Dog Man gets in trouble on the set. Banished from the production site, he sadly heads home to discover that Li'L Petey is missing. Luckily, 80-HD is there to explain what happened. Li'L Petey needs help!
To counteract the powers of the costumes Petey swiped from the studio, Dog Man also dons weaponized garb. Petey's plot to wreck the movie is progressing well. A hostage standoff endangers Yolay Caprese, and only Dog Man is equipped to save her. The situation turns desperate for Petey, who wants to avoid returning to Cat Jail. He buys some Cannery Grow to bring a mechanized monster to life and command it to fight for him. With that, the Beast of Eden is born, a massive Mecha-Bot shaped like a taco that embarks on a rampage and destroys Gassy Behemoth Studios. Dog Man, Chief, and their allies can't defeat the monster on their own. Li'L Petey summons 80-HD, but will it be enough to overcome the gigantic bot and short-circuit Petey's ambition for world domination?
Drawing key moments of inspiration from John Steinbeck's novels, Dog Man and Cat Kid is surprisingly sophisticated, silly as it is. The scrambling of the letters in "Gassy Behemoth Studios" is a smart piece of storytelling, taking us off-guard with its full meaning when Dog Man crashes through the wall in a copter and the letters disassemble from "Thoughtless Mayhem is Best" into a new formation: "Thou Mayest." All Li'L Petey needed was that suggestion that he can be different from his Papa, that good or evil is his choice rather than a genetic mandate he is powerless to override. His DNA is identical to Petey's, but his life need not be the same. He can strive for good rather than perfect, a conflicted hero doing the right thing even though it's not natural for him. Dog Man and Cat Kid is a satisfying book; I rate it two and a half stars, and could round up to three. If this is Dav Pilkey at his best, he's left a solid legacy in children's literature. I'm excited to read more from him.