Kevin Ryan is a fairly common name and might refer to several authors from different fields. Without more specific information, it's challenging to provide an accurate description of a particular Kevin Ryan. However, if you are referring to the author Kevin Ryan in the context of education, Kevin Ryan, Ed.D., is known as an emeritus professor of education at Boston University and the founder and director emeritus of the Center for the Advancement of Ethics and Character. He has written extensively on teacher education, character development, and moral education. If you meant a different Kevin Ryan, such as one who writes in another genre or field, please provide more details so I can tailor the description appropriately.