The DELOS Network of Excellence has announced its Third International Summer School on Digital Library Technologies (ISDL 2004) to be held in Pisa, Italy, September 6-10, 2004. This edition of the School will focus on "User-Centred Design of Digital Libraries". In particular, it will analyze a broad set of requirements for Digital Library systems coming from various user environments (libraries, museums, and archives) and will discuss the state of the art in several user-related themes such as user interfaces, information visualisation, and personalisation & recommendation