Spectrum Math helps students apply essential math skills to everyday life! The lessons, perfect for students in kindergarten, strengthen math skills by focusing on same and different, adding and subtracting, shapes, writing numbers, patterns, and more! Th

About the Author

Mercer Mayer – writer and illustrator for Little Critter First Readers, as well as Little Critter Spectrum began writing and illustrating children’s books in 1966 and since that time, he has published over 300 titles. Open almost any of the award-winning author/illustrator’s books, and out may pop dragons, cuddly monsters, wonderful creatures, and endearing critters.

“Most of my books are about things that happened to me when I was a little kid,” says Mercer. “Now that I’m a big kid, I write about things that happen now, especially with my own children. They always help remind me of what it was like.”

Born in Little Rock, Arkansas, Mercer Mayer spent his childhood hunting lizards and snakes in the swamps near his home. During his teenage years, he attended the Honolulu Academy of Arts. He later received additional training at the Art Students League in New York City. Upon completion of his studies, he set out with pen and ink to write and illustrate a collection of children’s book, reflecting many of the adventures he experienced as a child.

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ThriftBooks is a fully independent seller of used books, having sold more than 160 million used and new books since we started in 2003. Each quality used book is sorted, graded, shelved and shipped by hand by our team of dedicated employees in our seven warehouses across the US. We have the best selection of books, in the right condition and format, at everyday low prices. We also have a dedicated, US-based Customer Service team, ranked in the top three by Newsweek for Best Customer Service in 2018 and 2019, so you can shop with confidence. We support and invest in our employees, appreciate and value our customers, and truly believe in the power of the written word to educate, energize, and engage readers of all ages and interests.

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