Normally would have been 1 star, but Mildmay earned it an extra star.
A fairly entertaining book, but what kept it from being a great one was my inability to care a whit about one of the two point-of-view characters. Mildmay is awesome. Felix bores me to tears. Frankly, I'd love to see the author ditch Felix and write oodles of books about Mildmay.
Also... Hints of incest. Major turn-off with 2 characters as closely related as half-brothers.