What the Night Knows by Dean Koontz

This extensive collection of excerpts primarily details John Calvino's harrowing journey as a detective and survivor, grappling with a deeply personal supernatural threat. His investigation into the Lucas family murders unearths eerie similarities to the twenty-year-old Blackwood family massacre, which tragically claimed his own parents and sisters. The text reveals the terrifying reality of demonic possession through various characters like Billy Lucas, Reese Salsetto, Andy Tane, and Melody, each becoming unwilling conduits for a malevolent entity known as Ruin. Themes of family, trauma, the nature of evil, and the struggle between good and malevolent forces are interwoven as John races against time to protect his own family from a recurring nightmare, ultimately leading to a confrontation at a supernatural portal.