N.K Harrison 
Withering [EPUB ebook] 

Instinct and choice define a person, or at least Harrison Stone believes so, which is why he chose to become a warden. Despite his impressive efforts, however, it was always going to be his twin sister, Siljanna, receiving the admiration of their commander and father, Sampson Stone.Living in her shadow had its advantages, until a tragic event and devastating fire changed his life unimaginably.Forced to choose between Siljanna and one of his dearest friends, a recently exposed mage, Harrison follows his instincts and the consequences of that choice steer his life in ways he never envisaged.