Puzzle game Cryptogram uses a real bookshelf to open secret doors

[PCGamer]

[url]http://www.pcgamer.com/puzzle-game-cryptogram-uses-a-real-bookshelf-to-open-secret-doors[/url]

[Levelog]

My grandparents used to live in an area with very old very large homes that were a popular stop for the underground railroad and some I've been in have secret rooms and closets opened by hidden buttons, it's just as cool in real life as you'd think it would be.