Winner of the 2026 Mathical Book Prize! From the author of the award-winning Which One Doesn't Belong? and How Many? comes How Did You Count? , the latest title in Christopher Danielson's collection that is sure to spark conversation, questioning and wondering amongst both younger and older students alike. This listing is for a hard cover copy of the children's picture book. There is also a Teacher's Guide / Picture book set and a 5-pack of the softcover picture book available.