45 books • 8 series
Nature
Cool Crystals and Gemstones (Earth Rocks!)
The Physical Earth (Our Natural World)
Amazing Minerals (Earth Rocks!)
Animals Big and Small (Our Natural World)
Earth's Important Habitats (Our Natural World)
Incredible Rocks (Earth Rocks!)
Fantastic Fossils (Earth Rocks!)
Plants and Trees (Our Natural World)
Can Volcanoes Turn the Moon Blue? (The Big Questions Answered)
Are Birds Modern-Day Dinosaurs? (The Big Questions Answered)
Can Trees Talk to Each Other? (The Big Questions Answered)
Is There Alien Life in Outer Space? (The Big Questions Answered)
Is This the Biggest Dinosaur Ever? (The Big Questions Answered)
Will We Ever Live on the Moon? (The Big Questions Answered)
Trees, The Weird and Wonderful
Trees, Why Do We Need Them? (Trees)
Trees, Where Do They Grow (Trees)
Trees, How Do They Grow? (Trees)
Little Word Seekers: On The Farm (Little Word Seekers, #2)
Sassy Short-Haired Cats (Cats)
Awesome Long-Haired Cats (Cats)
Cool and Peculiar Cats (Cats)
Wonderful Wild Cats (Cats)