Sinister Sanctuary by Colleen Gleason

A nerdy (but sexy) scientist.
A writer on deadline.
A haunted lighthouse.
And a secret worth killing for…

Welcome to Wicks Hollow: a cozy town near Lake Michigan filled with quaint houses, eccentric residents, and more than its share of ghosts, murders, and sexy romance.
Teddy Mack has to finish the latest book her bestselling thriller series, or her editor and agent are going to come and park themselves on her desk and force her to write–so she decides to cloister herself in a small cottage attached to a Lake Michigan lighthouse for the summer. No wifi, no Internet, no distractions…
Until a heartbroken Oscar London, PhD, shows up with all of his microbiology equipment and takes over the same rental property. There’s been a double-booking, and neither Teddy nor Oscar are willing to leave, and so the neurotic writer and the love-bruised scientist decide to make do–and stay out of each other’s way.

Which isn’t all that easy to do after sharing an unexpected kiss in a hot springs pool…
Nonetheless, everything seems to be fine until Teddy discovers a ghost is haunting her writing space, and Oscar–who has no time for such silliness–witnesses some strange activity out on the beach.
Things become even more hairy when Teddy and Oscar realize someone is trying to drive them out of the lighthouse–or crazy. Which ever comes first.