Grumpy Ninja Hardcover

When things don’t go Grumpy Ninja’s way, Grumpy Ninja’s mood takes a dive and Grumpy Ninja becomes super grumpy.

For example, when the pencil sharpener refuses to work, it makes Grumpy Ninja lose control of BIG emotions. Until one day, a friend shares how a little rest, relaxation, and a simple change of mindset can change anyone’s mood and perspective, even when things go wrong.

Find out what happens in this comedic book about how a little gratitude might change your perspective.

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Why Us
Over 10,000 Amazon Star Reviews
Over 3 million books sold
#1 Best Seller in over 5 amazon categories
#1 Best-selling Author

Life is hard! And it’s even harder for children who are just trying to figure things out.

The best-selling children’s book series, Ninja Life Hacks, was developed to help children learn valuable life skills. Fun, pint-size characters in comedic books easy enough for young readers, yet witty enough for adults.

The Ninja Life Hacks book series is:

  • Geared to kids 3-11
  • Perfect for boys & girls
  • Early readers
  • Grades K - 6th grade and up
  • Excellent resource for counselors, parents, and teachers alike
  • Book Dimensions: 8.5"x8.5"

Collect all the Ninja Life Hacks books and box sets!

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