Ghost of an Enchantment (en Inglés) - J.E. McDonald

A witch walks into a bar...

An energy-reader of many talents, Stella Campfield juggles paranormal consulting, website design, and the tricky art of being a good witch. Her sudden streak of bad luck takes a nosedive when her best friend accidentally opens a portal to another dimension! A dangerous essence slips through, and Stella blames herself. Fixing the problem brings her face-to-face with the captivating stranger from the bar, the one whose addictive energy she can't ignore. Romance isn't on her agenda, especially with a police officer.

And the cop says...

Lucas Martinez believes in facts, not magic, but investigating a noise complaint draws him into the world of the paranormal-and right back to the enchanting woman he met at the bar. Burned floors? Floating books? Nothing adds up, so he enlists Stella's unusual skills. Consulting with a witch might ruin his reputation, yet he can't resist staying close to Stella as the bizarre mystery tightens around her.

Then a dark force stirs, something-or someone-that may have been there all along.