Frank Warren, known as the "most trusted man in America", is the author of several Post-Secret books. In 2004, while going through a rough point in his own life, Frank had the idea to leave blank postcards scattered in various locations. The instructions on the postcard were to share a secret that was true and mail it to Frank, anonymously. Word spread and since 2004 Frank has received over half a million postcards, many of which he's collected and published in the Post-Secret books. As a public speaker, Frank talks about the idea of secrets and shame, urging his audience to "Free your secrets and become who you are."