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1. This series explores dinosaurs by grouping them according to common physical features. The first five books each introduce readers to five different dinosaurs and describe how they looked, what they ate, and how they lived. The Relative of Dinosaurs features five swimming or flying reptiles that lived at the time of the dinosaurs.2. A simple diagram with each chapter shows the size of the dinosaur or relative compared to the size of a human.3. A pronunciation of the dinosaur or relative's name is included in each chapter, and information at the back of each book explains the meaning of these names.4. Interiors feature illustrations, photographs, or simple diagrams on every page, plus an easy-to-read font that mimics the letterforms that early elementary students are taught to print. Increased spacing between words supports early readers' recognition of word units; in addition, increased spacing between lines helps new readers keep their place.