Russian opposition leader Alexei Navalny's memoir to publish in October

• "It is the full story of his life: his youth, his call to activism, his marriage and family, and his commitment to the cause of Russian democracy and freedom in the face of a world super-power determined to silence him," publisher Alfred A. Knopf said in a statement.

Catch up quick: Navalny died at 47 after exposing corruption in Putin's inner circle and forming the most effective political movement against the leader.

• He had been in Russia's penal system for over 35 months before his death.

What's inside: The book, publishing on Oct. 22, includes never-before-seen correspondence from prison.

• Navalny recounted attempts on his life and the lives of people close to him.

What they're saying: Navalny's widow, Yulia Navalnaya, said the memoir, documenting his "unyielding courage" should inspire others to advocate for "what is right."

• "The 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," she said in a statement.

• Navalnaya, who had previously declined suggestions that she should enter politics, said after her husband's death that she would continue his fight.

Zoom in: Knopf will publish 500,000 copies in its first printing.

• The memoir will be published in hardcover, as an ebook and in audio.

The bottom line: "It expresses Navalny's total conviction that change cannot be resisted and will come," Knopf's statement said.

Go deeper: Putin critic Alexei Navalny has died, Russia's prison service says