Excerpts of a memoir written by late Russian opposition leader Alexei Navalny revealed he believed he would die in prison.

The New Yorker magazine published the excerpts Friday in anticipation of the release of “Patriot” on Oct. 22.

Navalny was President Vladimir Putin’s fiercest and most prominent foe and relentlessly campaigned against official corruption in Russia. He died in a remote Arctic prison in February while serving a 19-year sentence on several charges, including running an extremist group, which he said were politically motivated.