The Mage’s Rake by Sage Sutton

A deathly curse, ANOTHER attempted assassination, and steamy moon magic… Life in Sumarene is never boring!
Tensions rise as Ser Hugh investigates the mysterious attacks on the king’s life. Poison and alchemy leads Hugh into the mystical world of magick, where powerful forces are manipulated by only the gifted few. Unfortunately, his new partner in the investigation seems to hate him. Seriously. Why is Alan always glaring at him?
High Mage Alan, the King’s shy mage, didn’t really expect to be swept into the world of high intrigue and danger. But here he is–taking risks to save the one he secretly loves. Faced with a desperate choice, Alan has to decide whether to plunge into deep magic or watch the tom he adores die.
Love is worth challenging the gods over… right?