I just re-read my own post about the new Field Guide and realize that I made a completely erroneous statement about the Hostapedia, by the same author. I said "it is so extensive, with photos of almost every hosta listed". Not true! Many, many of the listings did not include photos. But almost all of the photos were taken by Zilis himself in gardens that he visited. He included listings for every hosta he found any info at all about even if not commercially available and in some cases no longer thought to exist. Incidentally the book weighs 12 pounds... the reason I joked about exercising my biceps! I apologize for my mis-information. I do highly recommend both books.