A Kiss of Daggers. Curse of the Fey Duelist, #1

Blood. Elves. And Duels. This is Arcadeax: a mystic land of honor, intrigue, and spellpunk arcana. A childhood tragedy trapped Remy Keaton in the faewylds with nothing but a blade forged by his need for vengeance. He doesn't remember his human life before that day but long ago learned the harsh ways of the seelie courts. When Remy rescues the daughter of a wealthy elven merchant from bandits he falls madly in love with her.
But a kiss from the elf girl would bring him a curse. Not only is love between the fey and the sons of Adam forbidden, but Jaira was promised to another: a capricious elf noble with a murderous reputation. The only option for Remy is to win a dueling contest that will earn him the kiss he desires and quite possibly purchase the respect of the fey kingdom. But when an enemy offers to restore Remy's lost life, he learns the high cost of either option: abandon the woman he loves to the wickedness of her betrothed, or enter the fight of his life and lose his past for ever.
Regardless of his decision, Remy must still face the horrors of Cathair Dé's arena. Can Remy and his friends escape Cathair Dé alive? If you like dark fantasy, paranormal, and urban fantasy with elves, magic, and mystery, then you need this book. For fans of Sarah J. Maas, Rae Carson, Holly Black, and Cassandra Clare