Dragon Dreaming by Julia Mills

Meeting your Mate after waiting two hundred years – Amazing!
Finding out she’s one of the legendary Dalgaard Sleipnir Shifters – Awesome!
Discovering that a crazy Sorceress has just murdered her mother, is hellbent on relieving your Mate of all her blood, and is wielding the power of the Goddess Rhiannon – One helluva bad day.

But Special Agent Donovan Cross refuses to be defeated. It’s gonna take a lot of groveling, a lot of begging, and the help of the Dragon King with whom he shares his soul, but this Guardsman will catch the killer, save his Mate, and make sure that gorgeous little filly lives happily ever after if it’s the last thing he does.