The Silver Cage by Ana Raine

Danny barely remembers who he is, let alone his mate. After being taken from his pack years ago by a group of overzealous hunters, Danny identifies only as “Wolf” — the pet of the pack who helps track down other shifters for the hunters’ sport.

When Danny tracks down a female wolf, he hesitates to help imprison her male companion. At first Danny doesn’t remember this wolf, at least not logically, but his senses are completely overtaken and he’s sure he’s met this Alpha before.

This wolf isn’t just his former Alpha. Jamie is also his mate, and after years of believing Danny dead, Jamie’s not going to let his mate go ever again. Even if it means working together to kill each of the hunters so they can never take their lives again — or come between their mating bond.