Whether your child has mastered Levels 1, 2, or 3, or is already a strong reader, Smithsonian Seriously Amazing Readers: Level 4 continues to engage and encourage reading ability. Six nonfiction titles—predators, space exploration, natural disasters, world wonders, ocean habitats, and the science and history of flight—appeal to readers ages six and older. Each title features colorful illustrations, diagrams, and photographs that present new information to the reader. Fluent readers will be exposed to interesting content while sharpening their literacy skills with longer and more complex sentence structures and unfamiliar terms. With fascinating topics and leveling outlined by Dr. Adria Klein, Smithsonian Seriously Amazing Readers: Level 4 challenges fluent readers as they continue on the path to literacy.