Digitalization has changed the preconditions for most media in recent decades, offering a rare opportunity to develop and change traditional media and the media market. The book medium is no exception. What is to be considered a book is being challenged, or, for some, threatened. As the e-book market grows there is, as with other media, still ambiguity in the direction of the development and the normalization of the e-book concept. This article discusses the extent to which physical form, genre and utilization are important when defining the book medium in the late age of print, contributing to the debate regarding the future of the book. The article is based on interviews with four prominent scholars in the research area of the digitizatio...