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About the Author
Claudia Mills has written many books for children, including the Gus and Grandpa series of beginning readers and, most recently, the middle-grade novel Lizzie at Last. 7 x 9 = Trouble! is her first chapter book. She lives in Boulder, Colorado.G. Brian Karas is the author and/or illustrator of numerous picture books. He lives in Rhinebeck, New York.