Matthew's in grade four, but he's also a secret agent and ninja A scary witch has appeared in the neighbourhood, and it's watching Matthew's house Matthew's most dangerous mission so far Follow the adventures of Matthew as he tries to balance his secret ninja life with going to grade school. Student by day, at night he battles monsters, evil robots and scheming clowns while trying to not get in trouble with his parents. Someone has to save the world Age Level 8 and up Grade Level 3 and up. Chapters, no pictures. The Grade School Ninja Series are funny and exciting thrillers that can be enjoyed by kids, adults and ninjas of any age. The were originally written as bed time stories for my son Rolan- though sometimes the cliff-hanger chapters were so exciting we had to keep reading