Does your roof have a shingle or two that should be replaced? Forget calling a professional roofer; they won't want such a small job. Handymen are much more affordable, but doing it yourself for free is even more so!
This book shows the steps taken to assess the situation, safely remove the damaged shingles, and replace them with new ones.
Multiple pictures show each step and the book is written so the typical homeowner can understand it.