These books discuss the purpose of each featured part, its diversity among various types of plants, and its function as food for humans. Each spread has a clear color photo that covers a strip of the left-hand page as well as the entire right side. The illustrations are particularly interesting because of their varying perspectives, some taken at ground level, other reaching upward to the soaring heights of treetops. The texts consist of two easy sentences per spread. Some of the explanations are unnecessarily simplified, and the science suffers a bit. In Stems, for example, the text misleadingly says Leaves make food out of sunlight, without mentioning water and minerals. As indicated in a note to parents and teachers, these books are designed to provide reading practice as well as subject knowledge and specific vocabulary. * School Library Journal *