Vesselless - Cortney L. Winn

The sensational enemies-to-lovers romantasy debut following the heir to a fantasy kingdom, and the seductive spirit sent to claim her soul. The exciting first book in The Merciless Realms series. 

Genre: Fantasy, romantasy

Pages: 448

Blurb:
'I’ve seen monsters, Nizzara, and you are not one of them. A little beast maybe, but not a monster.'

Nizzara has always been able to perceive spirits better than the average caster.

When she enters a deadly tournament to end her betrothal, she's determined to win without succumbing to the addictive spirit magic she channels or taking a life in the duel ring. Finding herself outmatched, Nizzara must face her fear of power and team up with Dagen – an enemy who is half-ghost and all charm – to survive the tournament. Dagen, the last King of Zarr, was killed by Nizzara’s father ten years ago.

Now a half-ghost – able to phase between his human and spirit form – he is stuck in another realm, hunting wretched souls. When his keeper offers him a chance to reclaim his freedom in exchange for Nizzara’s soul, Dagen takes the deal. There’s only one catch: she must freely give it to him by the tournament’s end or his own soul is forfeit.