Fortress of Shadows (Stonehaven League Book II)

The second book of the Stonehaven League series, novels written by Carrie Summers (http://.carriesummers.com)

again, this is a LitRPG type of fantasy novel, where the story is made to feel like an RPG game.
It features again the same main character, Devon Walker, only this time with a little bit of armor upgrade :D