I am quite interested in physical security and have written a handful of literature on the topic.
Contextual Physical Security
I co-authored a paper about defeating key systems. You can find it here.
One Page Guide to Lockpicking
The MIT Guide to Lockpicking is a great resource, but can be overwhelming to beginners. If you're new to lockpicking, check out my one-page guide.
Splash Class
I taught a Splash class on physical security. You can find the slide deck here.