When you have an idea for a puzzle related to the topic indicate it as follows:

**Puzzle FPE##:** Make the name of the puzzle bold and give it a personally-unique-identifier. Your initials followed by a number is a good approach.

If you want to be a good citizen update the [Puzzle Table of Contents](http://www.azimuthproject.org/azimuth/show/Applied+Category+Theory+-+Chapter+1+-+Puzzles)