The Greater Good — Susan Kelley

Healers, the peaceful Solonians trade with the people of the Realm for the one thing they need most and dont havemen to breed children. Lady Katerina soon realizes, however, that she wants far more than a breeder. She wants a mate. Unfortunately, Juston isnt the sort of man to take kindly to being traded as a stud, particularly when he discovers the Solonian marriage ritual includes fitting him with a control collar.