Henry is up to his usual mischief: annoying his younger brother, ruining Moody Margaret's sleepover, and irritating his teacher, Mrs. Battleaxe―not to mention trying to manipulate his family into seeing his favorite band―the Killer Boy Rats.

"Kids will love reading the laugh-out-loud funny stories about someone whose behavior is even worse than their own." ―School Library Journal

"Not since 'Nate the Great' has an early reader series created such a buzz." ―Los Angeles Times

"Will engage even the most reluctant readers."

―Publishers Weekly