\recommend reading a wonderful book by Arthur Loesser called "Men, Women, and Pianos."
Another book that I think should be required reading for any pianist is The Piano Book by Larry Fine. It doesnt have much on history, but it covers every aspect from how it works (I can count on one hand the number of pianists I know who actually know how the action works, trapwork, etc), to what to look for in buying used pianos, a list of manufacturers and brand names, etc. This book helped save me 2 weeks ago, I was playing at a school for a GATE day, and their Yamaha P22 had a broken damper pedal. I was able to fix it since I knew what to look for (adjustment screw on the trapwork and repositioning the steel dowl that connects the damper mechanisim with the pedal). If you were to call a technician out youd end up at least $50 poorer.
Think about it, as pianists we really are the worst out of any intrumentalist when it comes to what we know about our instrument, or even being able to fix minor problems. Im not saying we should all be able to tune and regulate, but at least know how it works!