36 books • 2 series
Lazy Ninja (Ninja Life Hacks, #4)
Grumpy Ninja (Ninja Life Hacks, #7)
Helpful Ninja (Ninja Life Hacks, #5)
Shy Ninja (Ninja Life Hacks, #14)
Inclusive Ninja (Ninja Life Hacks, #17)
Inventor Ninja (Ninja Life Hacks, #2)
Grateful Ninja's Gratitude Journal for Kids (Ninja Life Hacks Activity Books, #1)
Perfect Ninja (Ninja Life Hacks, #9)
Ninja Life Hacks Journal for Kids (Ninja Life Hacks Activity Books, #3)
eNinja (Ninja Life Hacks, #33)
Anxious Ninja (Ninja Life Hacks, #11)
Angry Ninja (Ninja Life Hacks, #1)