Eric is a "dark wolf", a lycan with a very pure bloodline that makes him almost royalty in the lycan world, but that also makes him more dangerous than a regular lycan because he is more powerful. Unfortunately, that bloodline doesn't protect him from stupid people and his pack is full of very stupid people :)
Chelsea is human and is searching for her missing sister. When Eric shows up during her search and attempts to protect her in his own Alpha way, Chelsea forges her own path - and finds herself in a lot of trouble. Eric is a quintessential hero though so he insists on helping Chelsea find her sister. As with most things, this turns out not to be as simple as you'd think and the action and drama that ensue make for an engrossing read.
Dark Wolf Rising by Rhyannon Byrd was published in December 2012 by Harlequin.
Eric Drake, a powerful Dark Wolf, has never trusted himself around human females-preferring to mate only within his pack. That is, until he encounters Chelsea Smart snooping around Silvercrest pack land in search of her missing sister. Secretly, Chelsea thinks Eric is the sexiest man she's ever seen, though she is wary of his potent Alpha energy. Then it's discovered that Chelsea's sister is being held by a pack of vicious Lycans, and Eric heroically leaps into action. Now, Chelsea will risk everything-her body and soul-to surrender to the passion that will mark her as Eric's woman for all eternity...if they survive.