The Frostblood Sage, Frostblood & Fireblood by Elle Blake books 1 & 2

Frost Blood Fire Blood by Elle Blake books 1 & 2 The Frostblood Sage Frostblood follows protagonist Ruby a Fireblood who has spent most of her life hiding her powers, but when soldiers raid her village and kill her mother she reveals her powers and is captured. But she doesn't stay there for too long. With the help of some 'friends' Ruby might just get her revenge. Books have read and stamped on title page, see images.