[tomsem]

I'd like better TOC navigation. Probably not my top one but it keeps coming up, particularly for technical books with huge TOC's.

With ePub readers, the TOC function usually accesses something called the 'NCX TOC', which supports TOC hierarchy and simple expand/collapse/up/down/jumpto. Kindle's mobi format is supposed to have this structure as well, but on Kindle there is no way to access it, even when it is there (as publishing guidelines require).

By contrast, Navigating the HTML TOC is tedious because you always wind up at the very top and it often extends over several pages. And it doesn't function at all to show your current location in the book, in fact it BECOMES your current location (ick), and inserts itself into the stack of visited locations which BACK button accesses (ick again). TOC is supposed to be a lookup, not a reading destination.

I'd like a single button access to the NCX TOC (ALT+T or something), which would pop up a scrollable window showing only the top level TOC entries, expanded as necessary to show your current location, highlighted. joystick/rocker would then allow you to navigate up/down/collapse/expand/jumpto a new location, BACK would return you to where you were.

If this were available functionally, especially if there were a dedicated button for it, I'd drop the requirement that books also have an HTML TOC since it would be a completely redundant waste of space.