Gary Stewart explains what it was like to grow up in a loving home and then realize that he is the son of the Zodiac Killer.

At his June 7 book signing at CitiPlace Barnes and Noble in Baton Rouge, Gary Stewart fought back tears as he recalled his adoptive mother and father and the love they shared by adopting him as an infant.

Leona Stewart sat at his side as he shared the beginning of his life story and the path he traveled that revealed his father as the Zodiac Killer.

With his co-author Susan Mustafa looking on, Stewart addresses a packed house at Barnes & Noble.

“When I went and visited my father’s grave in Mexico,” he recounted, “I talked to my father.  I told him I was sorry he didn’t have Lloyd an Leona.”

Gary said that “The Most Dangerous Animal of All” is the story of nature versus nurture and how a child can overcome his past with the love of family.

Gary and his co-author Susan Mustafa spoke to a packed house on Saturday and then signed extra copies of their book to leave for the bookstore.