However, perhaps the most famous example of a hidden passageway is what modern architects call a "murphy door," most often portrayed as those secret doors ... add a classic book opening mechanism.

Yet, the idea of a "secret garden" has persisted, been reimagined, and personalized. Some weave a wildflower woodland for their book-reading escapades; others prepare isolated recreational spaces ...

After borrowing a knock-detection script and hooking up a secondary access button concealed in a book, [Krizbleen] had the secret door he’d always wanted: albeit maybe a bit slow to open and close.