Joe Wikert has a great article about ebook indexes. I tried to add a comment, but it wouldn't let me so I thought I'd write it here:
Excellent article. Thanks! What I want to see is some way to differentiate index entries in an ebook. In print, I know that "125-138" indicates more in-depth treatment than say "125" and indeed, "125-126" indicates something different than "3-4", even though it's the same number of pages, just because we know that "3-4" is probably in an introduction.
And how are we going to label index entries at all? Of course, page numbers won't do it. So what's the alternative? Could size or color indicate depth? A bar that grows or shrinks according to depth?
I love the idea of pop-up summaries when you click an index entry. And what about if when you jumped to the referenced item, it was highlighted, at least temporarily, or you could choose to display indexed passages at will? How many times have you followed an index entry only to not be able to find the reference you're looking for?
The Back button is absolutely essential. The Nook's edition of Pride and Prejudice provides return links when you go to the glossary. I appreciated it even though it was kind of ugly.
I'd love to hear more thoughts on this topic.
[Was able to post comments on Joe's blog now.]