The Sealed Citadel is the first book in the Cycle of the Scour by one of my favorites, USA Today bestselling author, Edward W. Robertson. He takes witty to new heights and his inventive analogies continue to crack me up! I've read his Cycle of Arawn and Cycle of Galand series and place them collectively in my top five of all time. The Sealed Citadel is set decades before both so it would actually serve as an excellent introduction to this world. The Sealed Citadel features a young Cally, one of the most beloved characters from the Cycle of Arawn series. If you enjoy unique magic systems, this has a really good one, and it's another reason why I enjoy Robertson's writing so much. Plus, if you listen to the audio, you get to listen to none other than Tim Gerard Reynolds. My apologies for sending you down the Edward W. Robertson rabbit hole; you'll be there for a while.