Warden's Purpose - Jeffrey L Kohanek - Bog

A school of magic and invention. An academy of combat excellence. Discoveries await...some, deadly.
Everson is mentally gifted, and yet, he feels broken. Cursed with non-functional legs, he dreams of nothing more than being useful.
His sister, Quinn, is brave, relentless, and will do anything to protect her brother.
When Everson is sent to a school of magic and invention, Quinn joins a military academy to remain near him. Hidden danger lurks within the fabled institutions.
Quinn becomes embroiled in a struggle she doesn't understand, one with dire consequences as her training shifts from difficult to deadly. Her relentless determination might help her survive. If she only knew whom she could trust.
Within the other school, Everson studies a dangerous magic known as Chaos. Unable to wield this magic, he melds it with science, dreaming up inventions to reshape the future. His greatest discovery might change the world...or it could destroy everything.