I’ve kept a reading log for about 45 years now: I just log the date I finish reading a book and its title. I bought a very large and sturdy ledger in a sale about that long ago, and it’s served me well. So I can quite easily survey what I’ve read over the years and how much I’ve been reading – or not. And in pencil, I also note inside the back cover of each book, the date I finished reading it, which means I can always know how long it is since I read a particular book, how many times I’ve read it, or indeed if I’ve ever read it.
It’s not a lot of information, but I’ve found it interesting to note that I’m reading far less in my retirement than I originally expected to: partly, I’ve taken on board longer and more demanding books, I think, and also I have a raft of other things to occupy my time. I’d had bright ideas like spending a year re-reading Shakespeare, or a year reading science fiction, and never even got started on either of those projects. And I’ve also been astonished, when coming back to some of my old favourites, by just how long had elapsed since I last read them…
I’ve also kept an accessions register of all my books ever since I was at secondary school, which at some point when I had the spare time, got developed into a database; now I can quite easily check whether I have a particular book before I end up uselessly buying it for a second time… and I can do all the usual database things with my list of books, by author and subject-matter and so on. Dry and dull but useful, especially as I can also take a slimmed down version of it with me on my smartphone. I suppose it is also useful for insurance purposes, if anyone ever decided to steal a ton of books, or anything worse were to happen…
No doubt someone with a more statistical bent than I have might glean all sorts of useful and interesting information that I’ve never suspected; until I decide to build a second database of all the books I’ve read – some 3000 or so since my school days – that information will just lie dormant. But for the minimal amount of effort it’s taken over the years, I do commend the kind of record-keeping I’ve outlined, to serious readers out there, as a mine of useful information in all sorts of ways.