8.5x11in / 45 Puzzles / Over 1000 Clues + Keys / 10 Themes: 1. Wildlife of Different Continents: Puzzles focused on animals native to Africa, Asia, Europe, North America, South America, Australia, and Antarctica. 2. Endangered Species: Highlighting animals that are on the brink of extinction or are listed as endangered. 3. Aquatic Life: Featuring sea creatures from different oceans, including both shallow and deep-sea species. 4. Birds of the World: Exploring various bird species from common backyard birds to exotic species found in tropical rainforests. 5. Mythical Creatures: A fun twist with creatures from folklore and mythology, like dragons, unicorns, or the Phoenix. 6. Habitat-based Puzzles: Focusing on animals typically found in specific habitats like deserts, rainforests, mountains, and tundras. 7. Nocturnal Animals: Animals known for their nighttime activities. 8. Insects and Arachnids: Exploring the smaller, often overlooked world of bugs and spiders. 9. Prehistoric Animals: Featuring dinosaurs and other prehistoric creatures, exploring different periods like the Jurassic or Cretaceous. 10. Pet and Domestic Animals: Covering popular and lesser-known domestic animals and pets.