Mayersohn declined to discuss specific sales figures, but he did say that the margins on self-published books are very good (do I detect shades of Amazon here?), even better than those of the print-on-demand traditional books.
Book Business is nearly a decade old and at the time one of the emerging technologies in the industry was the Espresso Machine, which, despite its misleading name, does not make coffee but prints books a print-on-demand machine for bookshops.