The only 70+ book I could find was at Amazon:
Riding Past 100,
http://www.amazon.com/Bike-Life-How-...195396&sr=1-72
For the mechanical end I can recommend the following: Lennard Zinn,
Zinn and the Art of Road Bicycle Maintenance and
Zinn and the Art of Bicycle Maintenance, Eugene Sloane,
The Complete Book of Bicycle Maintenance (some history sections also included) and Bicycling Magazine's
Book of Bicycle Maintenance for Road and Mountain Bikes. You can find them at you local Bookstore or at Amazon.com. Joe Freil also has a handy
Bicyclist Training Diary and
The Bicyclist Training Bible for recording rides and training at any level, if you are so inclined.
You guys still riding actively are my heroes and I look up to y'all to keep me going, too.
Bill