In 1918 he returned to Moscow and attempted to get into the Volunteer Army, but was arrested and sentenced by the Bolsheviks to death for trying to cross the border.
Shiryaev was sentenced to death, which was replaced by 10 years of exile in Solovki prison camp, and along with hard labor Boris participated in the camp theater and the magazine "Solovetsky Islands", where in 1925-26 published the novel "1237 lines" and several poems: "Solovki", "The Dialectics of today", "Turkestan poems," etc.
On the eve of the outbreak of war Shiryaev taught history of Russian literature in the Stavropol Pedagogical Institute.
"Pee Dee" comes from the abbreviation of DPs, Displaced persons, so dubbed in the West after Second World War, millions of refugees who tried, often unsuccessfully, to find refuge from Stalin's secret police.
In Italy Boris Shiryaev actively writing fiction and literary articles, published in the Russian magazine "Rebirth" and "The Edge."
The first three Shiryaev's books - " Pee Dee in Italy "( 1952), "I'm a Russian" (1953) and "Lights of the Russian Land" (1953) were published in Buenos Aires, with the assistance of his associate, living in Argentina, the publicist and monarchical publisher Ivan Solonevich, whose brother, Boris Solonevich also sat in prisons.
The best-known works by Boris Shiryaev " Inextinguishable lamp "is dedicated to his stay in the Solovki prison camp.
"Dedicated to the memory of the artist Mikhail Nesterov, who told me on the day the sentence: "Do not be afraid to Solovki prison camp.