Forgotten Monster

Better with numbers than people, Taisce would have been perfectly happy managing the family estate the rest of his life. But when his older brother, Rupert, vanishes on a quest to find a mythical monster, Taisce has no choice but to find him before anyone realizes there's an heir missing. Sef has learned a thing or two about magic and poor life choices during his centuries of cursed immortality. He's also fresh from a missed appointment with the hangman and looking to get out of town quickly, so he happily volunteers to assist in locating the wayward brother.
In return for his services, Sef only wants one thing: for Taisce to break his curse. The fact that it will likely kill Sef (permanently this time) is just a bonus. But somewhere in the midst of bickering and searching for Rupert, Taisce and Sef start to struggle with keeping business separate from pleasure, leaving both wondering how exactly their quest is going to end.