Themes: Action, Environment/Pollution, Teamwork, Competition, The Future, Cycling, Responsibility. Dez and Jax love sky watching for their school. They’re talented, and they take pride in their work. But can they chase down thieves and return a special item back to its owner before it’s too late? Hi-Lo Chapter Books for Children. This series of short novels was designed to engage a broad spectrum of struggling readers. No longer will upper-elementary students have to read material junior to their maturity and interests. Characters are age appropriate and come from diverse cultures and backgrounds. Science fiction, sports, paranormal, realistic life, historical fiction, and fantasy are just a few of the many genres. Books are no higher than a 1.5 reading level, with illustrations on every spread that support visual literacy and draw kids into the text.