From the Book - First edition.
Chapter 1: Tape Measure : On the distance between here and here
Chapter 2: Hammer : On the force of the blow
Chapter 3: Screwdriver : On screwing and screwing up
Chapter 4: Clamp : On the necessity of pressure
Chapter 5: Saw : On severing a part from the whole
Chapter 6: Level : On shifting, settling, and shifting again
