I really enjoyed reading Conor Kelly and the Four Treasures of Eirean. It was educational. I learned a lot about Irish mythology and history, as well as it’s geography. It is tremendously informational, well researched and interesting. It made me want to visit Ireland, and learn more about Irish history. Isaac does a great job of bringing other worlds to life, which I have always considered the most difficult part of fantasy writing.
What I particularly liked was the transposition of one scene taking place in the same location at different epochs in history, making the past and present seem to merge together in a mystical, captivating way.