The Haunted Lighthouse (A Lin Coffin Mystery Book 6)

This is book 6 in the Lin Coffin series.
East End Lighthouse on Nantucket island is undergoing renovations and Lin Coffin's boyfriend has been hired to work on the project. When Jeff and Lin bike out to the bluff, Lin sees a ghost inside the lighthouse and he fills her heart with grief and loneliness.
Someone is trying to disrupt the renovation project by compromising the workers' safety, but is the person responsible for the problems alive or dead? Jeff, Lin, and her cousin, Viv, with the help of several others, work to solve two mysteries - what does the ghost want from Lin and who is trying to stop the lighthouse renovations?
This story has ghosts and some mild paranormal elements.