Even though I love reading and books...

These are some amazing alternatives from Offbeat Earth
I especially like this piece by Kaspan.

Boolean Searches

For quite a few years I have used Rockwell Schrock's Venn Diagram to teach Boolean operators and searching, but today I discovered Boolify, a new visual search tool that illustrates Boolean searching in an authentic way.
I think it will be a nice addition to the information specialist "bag of tricks."