The Fifty-Year Mission: The Complete, Uncensored, Unauthorized Oral History of Star Trek: The First 25 Years

As for me, I grew up loving the original Star Trek, and the book acted as a form of psycho-analytical sessions and helped me learn a lot about myself and why Star Trek meant as much to me as it did. One of the vignettes by a writer mentioned how he was taking a course on Joseph Campbell and it made him realize how important the creation of myths are for the proper functioning of individuals in civilization, and, for some, Star Trek helped us understand the world through the mythical world that it was creating.
Clearly, for fans of the original series, this book will not only giver insights about the making of the show, but also insights into oneself.