Sliding bookcase

A sliding bookcase is a wooden shelf or cabinet for bound volumes that is designed to move on rollers, a track, hinges, or another mechanism and is typically used to hide the presence of a secret room or space.

People have hidden in secret rooms concealed by sliding bookcases to escape detection from a government or police force.

[18] The Bredlau Castle in Lake Elsinore, California has a sliding bookcase that reveals an area used to hide liquor during prohibition in the United States.

Marriott luxury hotel in Puxi's Tomorrow Square, Shanghai, China has a sliding bookcase on its executive floor that leads to the building's rooftop.

[20] It was initially discovered by Pixar animator Andrew Gordon, who opened a hatch door in his office that revealed a hidden room that was designed to provide maintenance workers "access to a portion of the building's ventilation system".

[20] Gordon eventually converted the room into a full bar with furniture and carpet, and added a camera in the office aimed at the door to provide warning about anyone approaching.

[21] A character withdrawing a specific book or moving a statuette as the hidden trigger to open a sliding bookcase is a cliché of mystery stories set in old haunted houses.