- Rain forest ecosystems
- Civil War Technology
- Foxhounds, Coonhounds, and other hound dogs
- Dragonflies matter, by Tammy Gagne ; content consultant, Ruud Schilder, PhD, Assistant Professor of Entomology and Biology, Penn State University
- King Arthur
- Credit cards and loans, by Tammy Gagne
- Charlie Puth
- Todd Gurley, Tammy Gagne
- World War I technology, by Tammy Gagne ; content consultant, Dr. Justin Quinn Olmstead, Assistant Professor of History, University of Central Oklahoma
- Geckos, by Tammy Gagne ; content consultant, Edward L. Stanley, PhD, Department of Vertebrate Zoology and Anthropology, California Academy of Sciences
- Caring for rabbits, a 4D book
- Huskies, Mastiffs, and other working dogs
- Start your pet-sitting business
- Women in engineering, by Tammy Gagne ; content consultant, Amy Bix
- The ultimate guide to dog care:, everything you need to know to keep your dog happy and healthy, Tammy Gagne
- Cleopatra, Tammy Gagne
- Incredible military weapons
- Coral reef ecosystems
- Tundra ecosystems
- Kacey Musgraves
- Prince Harry
- Rattlesnakes, by Tammy Gagne ; content consultant, Leonard Jones, BA, graduate student, Leache Lab, University of Washington
- Giant galapagos tortoise
- Dragonflies matter
- African dance trends, Tammy Gagne
- Exploring the Midwest, by Tammy Gagne ; content consultant, Pamela Riney-Kehrberg, PhD, Professor of History, Iowa State University
- GPS technology
- Robots
- Smartphones
- Women in Earth and space exploration
- Caring for cats
- What is gaming disorder?, by Tammy Gagne
- Bighorn sheep
- Frogs matter
- Harry Styles, Tammy Gagne
- Meghan Markle, Tammy Gagne
- Jayson Tatum, Tammy Gagne
- Brachiosaurus, Tammy Gagne
- Bulldogs, Poodles, Dalmatians, and other non-sporting dogs
- Caring for fish
- Crocodiles, built for the hunt
- West Highlands, Scotties, and other terriers
- LA Galaxy
- King Arthur
- Eagles, built for the hunt
- The most endangered animals in the world
- Velociraptor, Tammy Gagne
- Athena, Tammy Gagne
- Charlemagne, Tammy Gagne
- Learning how to play dodgeball, Tammy Gagne