Ultimatum (Rising Moon #3) by MJ Riley.epub

A myriad of differences will tear them apart.

Samantha, driven by an irascible hunger for power, waits in the shadows while the wolves who hope to defeat her tear themselves apart. In his desire to gain the woman he loves as his life mate, Jackson combats his brother in a battle to end all battles. In the bowls of Caleb's fortress, Gabriel sees his infatuation come to fruition as he contemplates betraying everything he's ever held dear.

Their will to survive will bring them together.

In Caleb's den, an ultimatum surfaces: combine their efforts to defeat their common enemy, or let old grudges be their end. When Ava and Ophelia are captured in a move that could mean their ultimate end, all wolves must band together to save them - and exploit the rift that threatens to thwart their enemy in the most unexpected of ways.