One of my first introductions to critical thinking was through the Encyclopedia Brown books. They were more like riddles than mysteries, but they always taught you to pay close attention to the details and figure out which part was bullshit.
The author of these wonderful books, Donald J. Sobol, has passed away today.
If you have a few moments today, you can go read up on the ten most difficult cases or peruse the Encyclopedia of Encyclopedia Brown.
So long, and thanks for all the fun!