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 pack of five (5) softcover copies of the children's picture book. A Teacher's Guide/Picture Book set and a hardbook picture book are also available.