Rivals (The Cross-Worlds Coven Series, #3)

Though a temporary truce remains in effect with their new found ruby rivals, the Haven Coven struggles to come up with a long-term response to the Zarth incursion. In an effort to secure alliances with other powerful beings around the universe, Tiffany Smith is sent as part of a delegation to the magical world of Peth.

However, Tiffany soon comes into conflict with the Coven Elder leading the mission. Amid vicious werewolf and local witch attacks, she even comes to question the loyalty of those in their own ranks.

Meanwhile, Blake is having a hard time dealing with all of Tiffany's recent revelations. He also has his hands full with her rogue sister Valensa, who shows up at their Earth apartment while Tiffany is away.

Assailed from all sides, Tiffany must somehow blunt the ruby power for good while exposing the insidious plot to undermine her own Coven, all while saving her love from forces he can't even begin to understand.