I thought this book was super fun.
In the past, Elves invaded England and took the joint over. This book takes place in the 1700s, and by then the 7 bored Elven rulers have divvied up the kingdom and play wargames amongst themselves, with the King as prize.
This book takes place in Firehame, Lord Mor'ded's domain. The story centers around Dominic, his half elven (bastard) son who is his Champion, and Lady Cassandra, the lady the Lord hopes will breed him a new champion. (hopefully) Unbeknownst to the Elven court, Cass has been trained as an assassin to take out Lord Mor'ded.
And of course there's the requisite falling in love with the enemy and the shenanigans that ensue as Cass tries to keep to her mission and she's surrounded by court intrigues and her hottie new husband.