He wrote five books about the Holocaust period, in Sweden and in the United States after his liberation from the Łódź Ghetto and the Nazi camps, including Auschwitz.
Throughout his four years in the Łódź Ghetto (May 1940 – August 1944), he had sat in the evenings after a hard day's work and had written by hand many pages of poetry and prose, describing the hunger, pain, and anguish that the Jewish people were enduring.
He was a member of an underground group of Yiddish Writers which met at Miriam Ulinover's home in the Lodz Ghetto, each reading to her his poetry and awaiting her comments.
In 1939, his book of lyric poems "Yung Grin Mai" (English: "Young Green May"; Yiddish: יונג גרין מאי) was published in Lodz to great critical acclaim.
In spite of his suffering, while in the hospitals and sanitoria, he continued his literary work, and recited his poems before the groups of Jewish refugees arriving in Stockholm in order to encourage them.
Bryks spent the last 29 years of his life writing about the Holocaust until his untimely death in New York City from a stroke in October 1974 at the age of 62.