Vogler later expanded the memo .
Vogler later published it as the book The Writer 's Journey : Mythic Structure For Writers , which became the inspiration for a number of successful Hollywood films and is believed to have been used in the development of the Matrix series .
Vogler later expanded the memo and published it as the book The Writer 's Journey : Mythic Structure For Writers , which became the inspiration for a number of successful Hollywood films and is believed to have been used in the development of the Matrix series .