Barnum's own autobiography, first published in 1855 and repeatedly revised throughout his life. It sold over a million copies and was the founding document of his myth and of American self-promotion as a genre. Part memoir, part promotional device, part advice manual, it is the book that established Barnum as the archetypal self-made American showman.
Barnum's autobiography is a primary document in how a founder constructs and markets his own story. It sold over a million copies in his lifetime, not because people wanted to read about his life but because Barnum understood that his life was itself a product — and the book was a distribution channel for the Barnum brand. He used it to control the narrative after his 1855 bankruptcy, to promote his current ventures, and to cement his legacy.
For founders, the book is a case study in treating your own origin story as an asset to be managed rather than a biography to be recorded impartially. Barnum revised the autobiography repeatedly, adding and removing material as his reputation needed different emphasis. The lesson is that your story is not something that happens to you — it is something you build, and the best time to start building it is before you think you need to.