A memoir Alexei Navalny began working on in 2020 will be published this fall. “Patriot,” which publisher Alfred A. Knopf is calling the late Russian opposition leader’s “final letter to the world,” will come out Oct. 22.

Navalny’s widow, Yulia Navalnaya, said in a statement released Thursday by the publisher, “This book is a testament not only to Alexei’s life, but to his unwavering commitment to the fight against dictatorship_a fight he gave everything for, including his life. Through its pages, readers will come to know the man I loved deeply_a man of profound integrity and unyielding courage. Sharing his story will not only honor his memory but also inspire others to stand up for what is right and to never lose sight of the values that truly matter.”