Right, well then. For starters, I have this problem with any title that has the word "druid" in it (or "faerie," or "emerald," or references to the moon esp. if full, etc. -- you get the idea). Much like main character Cormac's problem with the American romantic notion of Ireland! My expectations immediately take a turn for the worse on exposure to the key words. I think I had already passed over this one once before I read Cruce de Caminos and got curious enough about Sean's continuing adventures to overcome my bias. 
 Also much like Cormac, I'm glad I did. 
 This is a gorgeous novel. The romance and the magic are beautifully balanced, neither feeling like a crutch for the other. The Good Folk are wild and dangerous, alluring and terrible in the same measure. The history of Ireland is a vivid and crucial part of the story, from the Troubles all the way back to the mythic age and the Tuatha de fighting the Fir Bolg. Despite this being Sean's first serious gay relationship, his hesitation stems less from "oh no sexual identity crisis" and more from "hang on, we've only just met and we've been in severely stressful situations; how much of this is coming from circumstances?" And something that always delights me -- when I figured out a key twist in the plot, it was revealed in the narrative in the next chapter, which is the perfect pacing for dropping hints to the reader and then confirming them. 
 I had the occasional problem with the stumbling blocks in the relationship development, but they were brief; nothing that bothered me ever became a major issue. Mostly, I just found myself breathlessly turning pages to see where it would go from here. Loved it, will definitely read again.