Jake Maddox 
Karate Rebels [EPUB ebook] 

Karate is the most important thing in Aliyah’s life. It allows her to fight — and she’s good at that. It also makes her feel like a winner. Nothing is more important to Aliyah than taking down an opponent, especially if it’s her main rival, Suma. Things soon change with the arrival of a new student, Zoya, who also happens to be Suma’s little sister. Aliyah sees something familiar in Zoya — an anger and aggression that reminds Aliyah of herself. Upon the request of Suma, and with the approval of the sensei, Aliyah agrees to train Zoya. Through their training, she helps Zoya control her anger but also manages to learn a valuable lesson of her own — winning isn’t everything.