Priestess Dreaming: An Otherworld Novel. Otherworld, #16

We're the D'Artigo sisters: savvy half-human, half-Fae operatives for the Otherworld Intelligence Agency. My sister Delilah is a two-faced werecat and a Death Maiden. Menolly is a vampire married to a gorgeous werepuma. And me? I'm a Moon witch married to three gorgeous husbands, and I'm about to journey through the veils to search for a long lost legend... With the war in Otherworld raging, the Queen of Shadow and Night summons me to her court.
Aeval orders me to embark on a hunt through the mists to find an ancient ally she once knew. I must seek out The Merlin and wake him from his long sleep. But Morgaine and Bran are along for the journey, and the pair pose a threat to both me and my quest. Now, surrounded by danger on all sides, I must pray they are allies rather than enemies, as we undertake a perilous search through the labyrinth of time...