The Darkest Hour is the fourth book in the thrilling, romantic Mediator series, from the New York Times bestselling author of the Princess Diaries, Meg Cabot.

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 - and not just from the knife at her throat, either. In life, Maria was the fiancée of Jesse - the same Jesse who was murdered 150 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?