Dry Spell (Elemental Magic #2‪)‬

Aileen Donovan is an elemental with magical control over water. When Aileen finds a mummified body at a scientist's convention in Seattle, she suspects supernatural foul play. Her amateur sleuthing, however, isn't the romantic getaway her human boyfriend, Colin, had in mind. Breaking into crime scenes and fending off black magic doesn't really set the mood.

As more bodies turn up, Aileen's insatiable desire to solve the mystery not only pits her against a serial killer, but also a cunning vampire lord, and an elemental agent with ulterior motives.

But the closer Aileen gets to the killer, the further she finds herself from Colin. Can she try to salvage their relationship and stop a murderer, or is she out of her supernatural league?