The Agency: Whistleblower.

The first book in a series based on the universe of the SCP Foundation, Following a federal agent named Mitchell Weaver who is being dragged down a rabbit hole after a soldier was found dead in his home, showing signs of a struggle. Guided by morbid curiosity, and a promise he made to the soldier's widow, Mitchell puts his career, his freedom, and even his life on the line to unveil the ancient secrets which culminated into the tragedy. But this town, these people seem restless and fearful. Something is most certainly amiss.