"Each year Pentagram issues a small holiday book as a greeting to its friends, clients and colleagues. The partners take turns researching and designing these books, which usually contain some kind of game or activity. This year's book, A Number of Numbers, has been designed by Michael Gericke and his team. Numbers are an especially timely subject, given their importance in recent world events and for the ways they connect us now more than ever. The book features seven numerical systems, from simple tallying to the Burmese system. . .We have adapted the book's content online. . ."--Publisher's Web site.