This series uses a look-and-find approach designed to build the confidence of early readers as they master new vocabulary. Four key terms are presented at the beginning of each title along with a picture identification for each word. Those terms are shown in an orange circle on the page where they appear in the text. Readers will also know they should look for the identifying image within the accompanying photo. Large-scale photographs throughout the book relate directly to the facts being presented. Close-up views of each planet, some of the moons and other characteristics, and even photos of probes sent to study the planets are included. A final answer key shows the photos with the image for each vocabulary word circled—just in case any prove difficult to find. VERDICT Perfect for early readers, with simple text and engaging photos plus the twist of a scavenger hunt.