NEW YORK (AP) — 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.”

Navalny, 47, died in February while serving a 19-year prison sentence on extremism charges that he condemned as politically motivated. He was jailed after returning from Germany in January 2021, where he was recuperating from the 2020 nerve agent poisoning he blamed on the Kremlin, and was given three prison terms since.