I once held an original copy of the book “The Visitations of the County of Devon” in my hands. It was well worn from use by other genealogy researchers.
The book was gone on subsequent visits to the library, either to theft or the failure of the old binding. Fortunately, I had photo copies of the pages that pertained to my ancestors … or at least I thought I had copies for all of them until I was contacted by other researchers who referenced other pages that I’d missed.
Since that time, I’ve always been on the lookout for another copy of the book so I could see the pedigree charts that were referenced in the email’s from the other researchers. Unfortunately, the book and I never seemed to be in the same location at the same time.
That all changed when Google Books came along. Now I have a ‘copy’ of the books in my Google Books Library that I can reference at any time. Thanks Google!