Thing Explainer

Complicated stuff in simple words

They had a snippet of this book in the most recent issue of Mental Floss (my favorite magazine, other than the New Yorker) describing a pencil. I didn't think a pencil could be described more simply, but they did it, and it was amazing.
Author of XKCD and What If?, Randall Munroe breaks down complicated technology and makes it understandable with simple words and clear diagrams. Check out Bill Gates review of the book: