Number of Letters, 2007 10 custom books, wicker, 15" x 10" x 7" A ten-volume set of books. Each set of books is unique in that it is bound in a different colour of Arrestox Bookbinding Cloth. There are eleven sets in the edition. The first ten sets are covered in a colour of bookbinding cloth that is unique to that set. The eleventh set consists of each of the ten books covered in a different colour, but each of the colours is one that was used in one of the previous ten sets.