Big thanks to
@lrb for bringing this to my attention yesterday. Thought I would share this ebook he mentioned to me:
https://leanpub.com/unintendedfeatures
It's a cheap buy at $10 and a lean 177 pages but pretty awesome stuff by Russ White (one of only about a dozen CCAr's in the world) and Daniel Dib (CCIE & CCDE and generally awesome guy). It's worth the day or two to read it.