Book Lovers Fear Dim Future for Notes in the Margins – NYTimes.com ⇥

Like many readers, Twain was engaging in marginalia, writing comments alongside passages and sometimes giving an author a piece of his mind. It is a rich literary pastime, sometimes regarded as a tool of literary archaeology, but it has an uncertain fate in a digitalized world.

Speaking of the transition from books to e-books, Dirk Johnson explores unique margin notes.