This was the first adult book on this subject I owned. I was given a a copy by my parents in the late 1950s. I still have the book and actually still use it, tattered and worn though it may be. Much has changed in the study and science of these amazing creatures and yes there is information out there that is more current. You have to realize that Ditmars was more or less the Grand Daddy of our modern day collectors and from a historical point of view, this was and is quite an important work. I can highly recommend this one.