Big Bad Boss: Moon Mad by Renee Rose

Rule #2 of Wall Street: Never show weakness
An alpha must protect his pack. Weakness isn’t an option.
Neither is the beautiful human who turned my world upside down.
But she is my obsession, I won’t let her go.
I’m feral with the need to possess her. To consume her.
Mating a human would destroy everything I’ve fought for:
My business, my pack, my family.
But I can’t resist this forbidden attraction.
And if I don’t claim her soon, I’ll succumb to moon madness–
a fate worse than death.

Moon Mad is book two in the Big Bad Boss trilogy. The books must be read in order. It features a billionaire boss-hole wolf shifter and his freakishly smart assistant.