In early 2007 there was an art exhibition in Stockholm by Swedish artist Kajsa Dahlberg,1entitled A Room of One’s Own/A Thousand Libraries.2The exhibition included a printed edition of a quite peculiar book the artist had composed. The book and the exhibition triggered some thoughts about book studies and the role of the reader, about bibliography and textual studies, and about marginalia and other kinds of reader interaction in books. But let us begin from the beginning — here is the background of the exhibition and the book.