OK!
I've been wanting to talk about this for some time.
What you have done, I think, is click the Yellow in black TAB at the top of the page.
That is where you store Comicmarks - which are bookmarks. Since you haven't stored any bookmarks yet, that page is blank.
Before the update - that happened to the site a couple of months ago, there was a link on the page that comes up when you select a book. That allowed you, if you clicked it, to select the book and bookmark it, so you could quickly come back to it at a later date.
Since the update, that link is no longer there, so you can no longer create a new bookmark. If you have previously bookmarked a selection, that selection is still there currently and accessible.
Mark, the Administrator, has had a fair bit of work to do after the update, since a number of things didn't work correctly after that. There are still a few glitches. Mark has been beavering away coding to fix them.
He has been reluctant to restore the comicmark feature - or let me say - it hasn't been a priority - because it is apparently actually quite complicated to do so. I seem to be one of the only people who uses the feature, since nobody else seems to have noticed its absence. If its not being used, that's a shame, because its a good feature. So ... consider this a survey..... If you think its a good feature and would like it restored, let us know. I certainly would.
Cheers!