Melody of Souls by Skye MacKinnon

Loving four men is complicated. When the fate of an entire faerie realm is in your hands, it’s even harder.

Avery’s work in the faerie realm of Evermist is far from over. The “pale ones”–mindless, vampiric monsters–continue to wreak havoc. She also wonders whether the Shadow King and Queen are truly defeated. And worse, there’s a traitor somewhere in her ranks.
Unwilling to believe any of her men could be capable of such treachery, yet fearing that it might be the case, Avery is about to embark on her most difficult trials yet.

Melody of Souls is the third and final installment in the Lost Siren series, a reverse harem romance full of heat, humour, and adventure.