Samurai Kids Series by Sandy Fussell, Rhian Nest James

Niya Moto is the only one-legged samurai kid in Japan, famous for falling flat on his face in the dirt. None of the samurai schools will teach crippled Niya, until an offer arrives from the legendary samurai warrior Ki-Yaga, sensei of the Cockroach Ryu. Niya and the other Cockroaches must defeat the fierce samurai students from the Dragon Ryu at the Samurai Trainee Games... moreNiya Moto is the only one-legged samurai kid in Japan, famous for falling flat on his face in the dirt. None of the samurai schools will teach crippled Niya, until an offer arrives from the legendary samurai warrior Ki-Yaga, sensei of the Cockroach Ryu. Niya and the other Cockroaches must defeat the fierce samurai students from the Dragon Ryu at the Samurai Trainee Games. Though they seem to be at a terrible disadvantage, it's not long before they learn that if they stick together, there is no journey that they cannot complete, no fear that they cannot face, and no battle that they cannot win. less

The kids from the Cockroach Ryu are back and this time they join forces with the Owl Ninja clan!The fifty years of peace that has ruled over the samurai ryus is coming to an end and only the Emperor can stop it. The kids from the Cockroach Ryu are back and make it their mission to get the Emperor to stop the coming war. But the last time the Emperor saw Sensei, he threatened to cut off his head! Will they be able to protect their Sensie and stop a battle?

Long before Sensei Ki-Yaga built the Cockroach Ryu, he travelled to China and studied at the Shaolin Temple in the north-western Song Shan Mountains. Sensei promised to return to help the abbot in the Temple's time of need. When the Samurai Kids learn that the abbott has a treasure in need of safekeeping, they set off on a journey to China.

The diversely talented Samurai Kids set off to rescue their friend — and find secrets in their midst -as the action-packed martial-arts series continues.The Samurai Kids are ready to travel back from China to the Cockroach Ryu, nestled in Japan's Tateyama Mountains. But then the unthinkable happens: Kyoko, one of the Cockroaches, is kidnapped. Sensei knows it is the mark of his old enemy Lu Zeng, an evil minister of the Forbidden City who is obsessed with eternal life... moreThe diversely talented Samurai Kids set off to rescue their friend — and find secrets in their midst -as the action-packed martial-arts series continues.The Samurai Kids are ready to travel back from China to the Cockroach Ryu, nestled in Japan's Tateyama Mountains. But then the unthinkable happens: Kyoko, one of the Cockroaches, is kidnapped. Sensei knows it is the mark of his old enemy Lu Zeng, an evil minister of the Forbidden City who is obsessed with eternal life. The Cockroaches must make a perilous journey to the Forbidden City, during which they encounter the mysterious, forest-dwelling Lin people. But Niya, the boy with one leg, has his trust tested when he learns that his best friend, Yoshi, is keeping secrets. Even worse, it seems that Sensei is not revealing all he knows either. Will all these secrets keep the Cockroaches from achieving their most important mission yet- rescuing Kyoko before Lu Zeng performs horrible experiments on her? less