DrMom, not to natter at you, but there is a new system here, and no one needs to "bookmark" anymore. Either go to the right of the entry page (say, the New Posts page), and look down the line for Books, and you'll soon find the thread.
Or look at My Posts, on the dark blue line above most pages.
I haven't looked at all the tags for Books threads, but on other subjects, you can usually just put the particular thing you are interested in into the Tags blank space, or, above, in the a2k google white space, and get fast results.
You can also tag the thread as Books, and then, when you come back to the computer, look at My Tags.