There are 45 books spanning these 5 years. The largest book is 12″ x 16″ and the smallest being 1.5″ x 2″. All the books have wonderful covers as described in Sketchbooks 1978-1999. Most of the art displayed here was drawn on rough paper made from rag/hemp. Paper with the greatest percentage of rag/hemp is the most absorbent and gives an almost watercolor effect.