Abstract: An assembling and addressing machine for magazines which are differently assembled in a number of different versions for sending to individuals falling into different demographic categories based upon interest, occupation or the like. A plurality of signatures are produced which are capable, upon selection in predetermined combinations, of accommodating all of the different versions. A gathering device gathers the selected signatures to form a book. Books in various versions are stored in temporary storage stations. The device operates under the control of address labels which include the address and indication of the demographic category. Means are provided for reading the category and for triggering release of a book from the corresponding storage station and to which the label is then applied. It is one of the features of the invention that means are provided in each storage station for sensing depletion and for signaling the gathering device to produce a group of books to replenish the depleted station.