Finder Tolan - Four Families, #1

Born and raised in nowhere villages, having moved to more of the same, and with a worthless drunk for a master, all Tolan really wants out of life is his own shop and a steady income. Given he's usually left to train himself in Finding magic and do his master's job, that's probably not happening anytime soon. Watching the shop one day while his master is out drinking yet again, Tolan gets an unexpected client: a child barely old enough to walk, screaming that Tolan 'find secret', and who clings to Tolan like he's all that's left in the world.
But finding secret proves to be a far greater task than Tolan ever could have guessed and leads him right into the arms of a man, and a life, that he never dared hope to find.