A. Hello Ann-Marie,
Charley Harper has had two books published. The first, "Birds & Words" is a small hardback book that contained fifty-one of his silkscreens that were produced as covers for "Ford Times" magazine, mostly from the 1960's. (This book is out of print.)
Flower Valley Press has since published Beguiled by the Wild, a coffee table book with 132 pages of his most famous serigraphs. We have this available online and in stock.