Yes, by title. And I often find out about them from friends, colleagues, and acquaintances. I also find out about a great deal of books from other books, either mentioned or cited/referred to.
I read some books cover to cover, and some are kept as references. Books are mainly on Math, Philosophy, and History. There are other topics, too.
I read in 4 languages and GR is very Anglo-centric. That's another issue.
I wanted to track my to-read and read for every book that I found.
I cannot do that with GR anymore.
(I am unsure to whether you are asking about my use case about the sites or the books. So I answered both.)
I read some books cover to cover, and some are kept as references. Books are mainly on Math, Philosophy, and History. There are other topics, too.
I read in 4 languages and GR is very Anglo-centric. That's another issue.
I wanted to track my to-read and read for every book that I found.
I cannot do that with GR anymore.
(I am unsure to whether you are asking about my use case about the sites or the books. So I answered both.)