107 Days

107 Days is a political memoir by Kamala Harris, the 49th vice president of the United States, in collaboration with author Geraldine Brooks. The book details Harris's 2024 presidential campaign spanning from Joe Biden's withdrawal from the election on July 21, 2024, to Election Day on November 5, with the title referencing the length of her campaign. It was released by Simon & Schuster on September 23, 2025, in hardcover, ebook and a ten-hour audiobook edition read by Harris.

As of September 30, 2025, the book has sold 350,000 copies in the United States, and is projected to sell at least 500,000 copies. CEO of Simon & Schuster Jonathan Karp said the book was one of the best-selling memoirs in the 2020s.

As of January 2026, the book has been featured on the New York Times' Hardcover Nonfiction best-seller list for 15 weeks in a row.

On July 31, 2025, Simon & Schuster announced that Harris would publish a memoir about her 2024 presidential campaign, with a release date of September 23. In a video posted on social media, Harris stated that the memoir was derived from a journal in which she wrote her reflections and recollections of "the shortest presidential campaign in modern history". Harris collaborated with Geraldine Brooks to give the book a "novelistic feel", and Simon & Schuster CEO Jonathan Karp stated that the book reads more like a suspense novel than a political memoir. The memoir was coedited by Jonathan Karp and Dawn Davis, the senior vice president of Simon & Schuster. An audiobook version of the memoir narrated by Harris was announced to be published on Audible.

On August 21, 2025, Harris announced on social media that she would be starting an international book tour in September 2025 to promote 107 Days. She scheduled eighteen appearances in cities across the United States, Canada, and the United Kingdom; the first leg lasted through November 2025. In December 2025, Harris announced a second leg of the tour beginning in New Orleans on January 13, 2026, and finishing in Anaheim in April 2026.

In the book, Harris calls leaving the decision to run for re-election solely up to Joe and Jill Biden "reckless". Harris acknowledges Biden's age and health concerns, but says that Biden was still capable of functioning as president. Nonetheless, Harris states that she was "angry and disappointed" with Biden for his poor 2024 debate performance with then-former president Donald Trump, particularly because he did not understand how bad his performance was. In contrast to Biden, Harris did have a more well-received debate performance with Trump. Harris described her preparations for the debate in the book, which were led by Karen Dunn.

Harris compared her loss, in which she lost the popular vote by 1.5% (48.3–49.8%) and the Electoral College 226–312, to the 2008 Super Bowl. She lost Wisconsin by 0.9%, Michigan by 1.4%, Pennsylvania by 1.7%, and Georgia by 2.2%. She quoted Tom Brady, who similarly described being surprised and devastated by his loss when the New England Patriots lost to the New York Giants 14–17.

Harris does not say whether she will run for political office in the future in the book. She declined to run for Governor of California in the 2026 California gubernatorial election. Harris has expressed potential interest in running again for president in the 2028 United States presidential election.