Thanks folks, I looked this book over and can not find an IBN number, have found the library of congress number and Crown books 1969 edition, doesn't say anything about a secound printing or third.The cover doesn't look like the cover on the hard back versions of it i have found on the net. The cover is kinda like an aqua blue and green with a large mayfly on the front and its imation in the uper right hand corner with the Arthur and title printed on it as well. Maybe they just din't print as many hardback versions cause it is meant to be carried as a streamside guide so was mostly printed in paper back, as my son would say, iunno. iether way, its a cool little book and I like it...