I’ve talked a LOT about Patricia Briggs here, all of whose books I love, particularly the Mercy Thompson series.
These books take place within the same universe, concentrating on events in Bran’s pack instead, particularly his son Charles. While I think they discussed the concept vaguely in the Mercy books, these books also focus on Anna, who is an “omega”, a sort of “powerful submissive” who can stand up to alphas in a way no other wolves can.
Just as with the Mercy books, the action is great, the romance is great, they feel very real and believable and oh my god I cannot wait for her to write another one!!!!!