The Omega’s Unexpected Bounty by Tabatha Austin

Caan loves his freedom. It’s his biology that troubles him. Omegas like him are a rare breed, but life as an unmated bounty hunter makes him even more of an anomaly in a world of desperate Alphas, eager to mate and impregnate an Omega.
On a mission to rescue his biological parent from prison, it’s all he can do to evade capture and a lifetime of pregnancy and servitude. But his luck runs out moments before the daring rescue attempt comes to fruition.
Graden, a muscled prince on the precipice of being named king, makes a tempting offer that will change his circumstances. Unbeknownst to them, it may also turn the tables on the bounty hunter as well.