The Book Notan is a stimulating journey in to the World of design.Every aspiring designer should own this book. The excercises are sure to help in the devolopment of an understanding of the importance of "negative" space and it's relationship with good design. I would recommend this book to ages 12 and up, for those with an eye for art, or who would like to devolop their eye. I find myself returning to this book on a regular basis to refresh my Vision and kick start my creativity. An Exceptional Book!!