I don’t know how I missed this, but Wayne Thomas Batson has written a sequel to Isle of Swords and Isle of Fire!
Isle of Stars
The wedding of Griffin “Cat” Thorne and Anne Ross is on! Or is it? Captain Tobias Dredd, the infamous pirate “Toby Scratch,” has been scouring the South Pacific, searching for Father Carroll, a member of the clandestine holy warriors known only as The Brethren. When Dredd’s ship, The Red Corsair, levels a Brethren monastery, Declan Ross and the crew of The Robert Bruce are called upon to pursue Father Carroll and maintain his safety at all costs. The hunt for Father Carroll is on between Ross and Dredd. At stake: the lives of everyone involved and a treasure worth three times the world. For Father Carroll alone knows the location of The Isle of Stars, and he knows its secrets.
I may have squealed when I saw this. I’m a huge fan and although I’ve fallen behind on reading his books, (there’s a lot, what can I say) he’s still one of my go-to recommended authors for tweens and teens.