I often wish for interactive, annotated, "hypertextual" versions of books -- technologically it should be trivial to build. M&M is an obvious example; there ar

I often wish for interactive, annotated, "hypertextual" versions of books -- technologically it should be trivial to build. M&M is an obvious example; there are many (Tolstoy, Dumas, Conrad, Zola, Proust and, in more modern times, Patrick O'Brian) where historical, biographical and technical annotations would be hugely useful and fun. In the case of translations, concurrent access to the original would also be awesome. One of the earliest web versions of this that impressed me was a "Web 1.0" hypertext version of T. S. Eliot's The Wasteland, which is a poem constructed almost entirely out of allusions, and which makes little sense without the necessary annotations. Do any of the eBook formats support anything like this? Have anyone done this in a way that's accessible in any meaningful way on a Kindle?