Age of Assassins (The Wounded Kingdom Book 1)

Blurb

When a young apprentice to an assassin is blackmailed to protect the crown prince, he becomes embroiled in a conspiracy that could destroy an entire kingdom in a brilliant epic fantasy debut by David Gemmell Award-nominated author RJ Barker
Girton Club-foot has no family, a crippled leg, and is apprenticed to the best assassin in the land. He's learning the art of taking lives, but his latest mission tasks him with a far more difficult challenge: to save a life.
Someone is trying to kill the heir to the throne, and it is up to Girton to uncover the traitor and prevent the prince's murder.
In a kingdom on the brink of civil war and a castle thick with lies, Girton finds friends he never expected, responsibilities he never wanted, and a conspiracy that could destroy an entire kingdom.
The Wounded KingdomAge of AssassinsBlood of AssassinsKing of Assassins