9781587284175 | Spi pap/cd edition (Two-Can Pub Inc, May 1, 2004), cover price $14.95 | About this edition: Through an engaging text and an interactive CD-ROM, readers can find out what makes a reptile a reptile, where reptiles live, what they eat, how they trick their enemies, and who are the reptile record-breakers.

9781587283437 | Pap/cdr edition (Two-Can Pub Inc, September 1, 2003), cover price $14.95 | About this edition: Presents information on the physical characteristics, habitats, life cycle, and behavior of different species of dinosaurs.

9780382392733 | Silver Burdett Pr, April 1, 1996, cover price $22.00 | About this edition: Features seven wonders of the natural world including the Grand Canyon, the Great Barrier Reef, and Mount Everest, and shows how they were formed and why they are changing

9780382392740 | Silver Burdett Pr, April 1, 1996, cover price $12.00 | About this edition: Features seven wonders of the natural world including the Grand Canyon, the Great Barrier Reef, and Mount Everest, and shows how they were formed and why they are changing

9780791060490 | Chelsea House Pub, October 1, 2000, cover price $18.95 | About this edition: Provides information on the seven natural wonders of the world including the Grand Canyon, Mount Everest, and the Sahara Desert.

9780783547657 | Time Life Education, September 1, 1995, cover price $16.00 | About this edition: Explains what fossils can tell us about dinosaurs, describes different species, and speculates on how dinosaurs raised their young, kept warm, ate their food, defended themselves, and why they became extinct