Oh, joy! I found a website that allows me to (fairly) easily create a library of all my books. It’s called LibraryThing, and you enter the ISBN (International Standard Book Number), and 9 times out of 10, up pops your very book, with all the pertinent details, including how many other LibraryThing members carry that book in their collection.
I now know that I have more than 200 books, as that is the limit for free use of the site. As a measure of my commitment, I will plunk down the ten bucks to add more books. I’m almost there, almost ready to organize my collection by topic and title and get them back on the shelves, ready for reading.