DEF19 academic blog is part and parcel of the eponym ANR project, led by the CHCSC (UVSQ), the Pôle Métiers du livre (UPOND), the BnF and the Archives Nationales. The goal of this ANR project is to create a dictionary of 19th-century French publishers (both in the form of a printed book as in the form of an online crowdsourcing database). The aim of this blog is to propose to the academic community, book and publishing professionals, students and to everyone interested, a wide range of scientific resources related not only to the development of the project, but also to the current research, in France or abroad, dedicated to the history of the book and publishing in the 19th-century.