Lock Every Doo

"After responding to a mysterious newspaper advertisement, Jules Larsen gets a job as an apartment sitter at the Bartholomew, one of Manhattan's most famous and secretive buildings. At first, the extravagance of the Bartholomew feels like a lucky break for recently heartbroken and penniless Jules, who has been haunted by misfortune for most of her life. But when a fellow apartment sitter in the building goes missing, Jules begins to suspect there are dark forces at work behind the Bartholomew's glamorous facade. Digging deeper into the building's past, Jules soon realizes that the Bartholomew is more dangerous than she thought--and that escape may be impossible."--