100 books • 25 series
Cicadas (Bugs, Bugs, Bugs!) (Pebble Plus: Bugs, Bugs, Bugs!)
Mosquitoes (Bugs, Bugs, Bugs!) (Pebble Plus: Bugs, Bugs, Bugs!)
Centipedes (Pebble Plus: Bugs, Bugs, Bugs!) (Bugs, Bugs, Bugs!)
Flies (Bugs, Bugs, Bugs!) (Pebble Plus: Bugs, Bugs, Bugs!)
Fireflies (Bugs, Bugs, Bugs!) (Pebble Plus: Bugs, Bugs, Bugs!)
Wasps (Bugs, Bugs, Bugs!) (Pebble Plus: Bugs, Bugs, Bugs!)
Dragonflies (Bugs, Bugs, Bugs!) (Pebble Plus: Bugs, Bugs, Bugs!)
Beetles (Bugs, Bugs, Bugs!) (Pebble Plus: Bugs, Bugs, Bugs!)
Crickets (Bugs, Bugs, Bugs!)
Grasshoppers (Bugs, Bugs, Bugs!)
Ladybugs (Bugs, Bugs, Bugs!)
Praying Mantises (Bugs, Bugs, Bugs!)
Ants (Bugs, Bugs, Bugs!)
Spiders (Bugs, Bugs, Bugs!)
Beavers (Wetland Animals)
Herons (Wetland Animals)
Muskrats (Wetland Animals)
Polish Americans
Vietnamese Americans
Irish Americans
Mallards (Wetland Animals)
Penguins and Their Chicks (Animal Offspring) (Pebble Plus: Animal Offspring)
Ducks and Their Ducklings (Animal Offspring) (Pebble Plus: Animal Offspring)
Gorillas and Their Infants (Animal Offspring) (Pebble Plus: Animal Offspring)