Kings of the Wyld (The Band, book 1)
From the publisher:
Clay Cooper and his band were once the best of the best, the most feared and renowned crew of mercenaries this side of the Heartwyld.
Their glory days long past, the mercs have grown apart and grown old, fat, drunk, or a combination of the three. Then an ex-bandmate turns up at Clay’s door with a plea for help–the kind of mission that only the very brave or the very stupid would sign up for.
It’s time to get the band back together.