Join New York Times-bestselling author Andy Griffiths on another wild storytelling adventure in the series Publishers Weekly describes as "Anarchic absurdity at its best." and School Library Journal calls  "Wildly humorous without being smart-alecky or sarcastic, this is a top choice for middle-grade readers.”  This time, come hang out with him and his friend Terry in their 78-Story Treehouse – the sixth book in the illustrated chapter book series filled with Andy and Terry’s signature slapstick humor!.

Andy and Terry live in a 78-story treehouse. It has a drive-thru car wash, a courtroom with a robot judge called Edward Gavelhead, a scribbletorium, a combining machine, an ALL-BALL sports stadium, a high-security potato chip storage facility, and an open-air movie theatre with a super-giant screen . . . which is a very useful thing to have now that Terry’s going to be a big-shot movie star! After Andy gets cut out of the movie, he and Terry have a big fight and decide they don’t want to be best friends anymore. But with a herd of sneaky spy cows out to steal all their story ideas, can Andy and Terry make up before it’s too late?

 Andy Griffiths  is one of Australia’s most popular children’s authors. Best known for the Treehouse series, he’s the author of the JUST! Books, Killer Koalas From Outer Space, The Big Fat Cow That Goes Kapow, The Cat on the Mat Is Flat, and The Day My Butt Went Psycho. Over the last twenty years Andy’s books have been New York Times bestsellers, adapted for the stage and TV and won more than 50 Australian children’s choice awards. Andy, a passionate advocate for literacy, is an ambassador for the Indigenous Literacy Foundation and the Pyjama Foundation.