Themes: family, friendship, trust, fear, trying new things, nature, futuristic technology, outer space. Sam has waited so long to take a trip into outer space. He finally gets to go when he's invited to visit some of his family members on Earth. Will Sam love his stay on Earth or end up longing for the comforts of home? Hi-Lo Chapter Books for Children. This series of short novels was designed to engage a broad spectrum of striving 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.