Over the last two decades digital resources have proved to be extremely useful even in the humanities. Apart from library catalogues and sophisticated databases, which enable any reader from anywhere in the world to search for items and often offer free access to rare books and prints – not to mention a huge project like Google books or the diffusion of e-books as an alternative to printed materials – websites and computer programs have become an essential part of the daily work of scholars, and they keep providing wonderful opportunities to collect, analyse and compare primary (and secondary) sources.