Creative Home Engineering integrates “silent, automated hidden passageways” into your home. How cool is that?! Beyond the standard “pull on a book” or twisting a candlestick, their custom switches give you the ability to activate the passage entries any way you want. The “triple-redundant safety features includ[e] optical sensor arrays, overtorque protection, thermal sensors, infrared sensors and mechanical obstruction detectors” as well as biometrics (fingerprints, optical and voice). They apparently have pre-fab kits ($150+) available for those who can’t afford a complete solution ($10,000). Link via one of my favorite authors, Neil Gaiman.