Darkest Hour

Darkest Hour is the fourth entry in Meg Cabot's The Mediator. It was the final book in the series to be published under Cabot's pen name Jenny Carroll by Simon Pulse. The book was republished by HarperTeen under Cabot's real name. It was preceded by Reunion and Haunted.

Book description

 * "What-or who-is buried in Susannah's backyard? When the nineteenth-century ghost of Maria de Silva wakes her up in the middle of the night, Suze knows this is no ordinary visitation-not just from the knife at her throat, either. In life, Maria was the fiancée of Jesse-the same Jesse who was murdered a hundred and fifty years before. The same Jesse Suze is in love with. Maria threatens Suze: The backyard construction must cease. Suze has a pretty good idea what-or rather, who-Maria doesn't want found. But in solving Jesse's murder, will Suze end up losing him forever?"