Why You Are The Way You Are, by Dr. Kevin Leman. Dr. Leman takes the four positions in the family; first born, middle child, baby, and only child, and tells how that position helps shape your personality and influences your interests and career choices. He gives the typical strengths for each birth order to nurture and the usual weaknesses to be overcome. He includes relationship information of all types. I enjoy personality theory books; this one is more anecdotal than evidence based, though he does include notes referencing scientific studies on occasion. I have had the pleasure to hear Dr. Leman speak at a Hearts at Home Conference; he is a delightful man. This is an enjoyable book. It helped explain some things I'd wondered about in my family of origin for many years. Big plus!