Meet a pair of playful monster mathematicians who love odd and even numbers. In this enchanting new book, kids will accompany the two monsters as they sort through groups of spooky and unusual odd- and even-numbered things. The text is sure to delight children as it reinforces their reading and math skills. Each 32-page book features controlled text with age-appropriate vocabulary and simple sentence construction. The rhyming text, colorful design, and spooky art will excite and engage emergent readers.