I've looked at solutions like GoodReads, but the whole social media aspect doesn't appeal to me, nor does their privacy policy. I'd like something simple and private. Cross-platform or some syncing option would be preferable, but not required: I was previously tracking my reading using a great local-only Android app called Book-a-log[0], but then the device on which it was installed was stolen, so, those records were lost.
[0]https://play.google.com/store/apps/details?id=com.srivathsanvk.bookscatalog