While e-journals have fully responded to user's needs since being imposed in university libraries and documentation centers, the paper book now experiences its digital transformation and is looking for its place. After a failed attempt in the year 2000, the more recent arrival of improved reading supports and numerous catalogs of books in digital format have aroused the interest of libraries for electronic books. We will have a further look at the pertinence of integrating electronic books within the collections of a medical documentation centre, using the example of Jeanne de Flandre Hospital. The objective is to define the concept of an electronic book, to take into account the expectations of physicians' foreseen practices, to draw up a panorama of the paid supply of scientific medical electronic books, and finally to call to mind the key points for a successful integration and encouraged usage. Keywords : Digital book, electronic book, e-book, editor, aggregator, digital market, electronic resources, medicine, scientific information, library, documentation center.