I don't think there's any other way to add and edit cookbook tags, but one shortcut I always take is to manipulate the link to quickly skip to the page I need. So if you go to My Bookshelf and click 'next page', then the link will look like this:
http://www.cookbooker.com/bookshelf/337/kaye16?books&orderby=sort_title&ordersort=asc&page=2
See that number at the very end of the link? Just change it into the page no. you think you need, i.e. for a book starting with S, that might be page 9 or 10.
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