Together with his friends Carly, Matt, and Umberto, Derek has fun learning about all the cool aspects of ninja culture. When someone starts vandalising their school with graffiti of a mischievous troll-like figure, these ninjas-in-training are convinced they'll be able to crack the case. But it turns out that being a ninja is a lot more work than they thought, and this adventure brings about new opportunities for Derek to embarrass himself. For once, can he be the hero that saves the day?
- ISBN10 1250294150
- ISBN13 9781250294159
- Publish Date 1 May 2019 (first published 11 April 2017)
- Publish Status Active
- Out of Print 5 April 2024
- Publish Country US
- Imprint Square Fish
- Format Paperback
- Pages 256
- Language English