The Ugly Black Bird: The Untold Story of Jerzy Kosinski's Wartime Childhood, by Joanna Siedlecka and Chester Kisiel. 2018.
Reviewer: Mr. Jan Peczkis
Exposes Falsehoods of Poles Killing Jews (Jerzy Kosinski vel Lewinkopf: PAINTED BIRD).
Just Like Those "200,000 Jews Killed By Poles During WWII" (Jan Grabowski in
JUDENJAGD)
The original 1994 book, by Joanna Siedlecka, is CZARNY PTASIOR (THE BLACK BIRD-MONSTROSITY). (The pagination in my review is based on this old Polish-language version). This work consists of a series of interviews with people who remembered Jerzy Kosinski and his family, and the actual turn of events. The Kosinski's (Lewinkopfs) were an assimilated, fairly well-to-do family. (p. 18).
MENDACIOUS HOLOCAUST FICTION MASQUERADING AS FACT

Jerzy Kosinski: A Biography, by James Parker Sloan. 1996.
Reviewer: Mr. Jan Peczkis
The Widely-Read and Highly-Acclaimed Jerzy Kosinski vel Lewinkopf's PAINTED BIRD: A
Rescued Polish Jew Who Expressed His Gratitude By Slandering His Rescuers. His Peasants-Are-Evil Mendacity Lives on in the Recent Media-Touted Pronouncements of Jan T. Gross, Jan Grabowski, and Barbara Engelking
This book surveys Kosinski's early life, his new life in the US, his travels, his celebrity status, his sexual libertinism, and his suicide. That latter is portrayed as a well-planned event.
ONCE AGAIN, TELLING LIES FOR A BETTER ANTI-POLISH STORY
Author James Sloan comments: "Only Kosinski knew that the peasants he had encountered, while certainly no angels, had been nothing like the villains depicted in his novel." (p. 421). The incident about the altar-boy Kosinski being thrown into a pit of excrement, for accidentally dropping a missal, is admittedly fictional. (p. 36). For more on the specifics of Kosinski's mendacity, read the detailed English-language Peczkis review of Czarny ptasior (THE UGLY BLACK BIRD).
JOINING THE ZYDOKOMUNA: "YOU KNEW I WAS A SNAKE"

The Painted Bird, by Jerzy Kosinski (Lewinkopf). 1965.
Reviewer: Mr. Jan Peczkis
Here We Are 50 Years Later, and the Very Same Lurid Anti-Polish Accusations, of This Highly-Acclaimed But Demonstrably-Fraudulent Book, Are Freely Repeated By Far Too Many Jewish Authors and Journalists as Fact
My review is based on the original 1965 Edition of PAINTED BIRD. In the front insert, this book is lauded by the LIBRARY JOURNAL, the (surprise) NEW YORK TIMES, and COMMONWEAL. In fact, COMMONWEAL calls it a “deeply moral work” (Reader: Try not to laugh).
Fact is, this book is a fraud of the highest order. For instance, see my reviews of:

SOVIET CONCENTRATION CAMPS (GULAGS) WERE

 ADMINISTERED BY JEWS

• The Jewish Century by Yuri Slezkine – Published August 27th 2006 by Princeton University Press (first published 2004), Edition Language: English.
• https://press.princeton.edu/titles/7819.html

An Eye-Opening, Candid and Detailed Analysis of the Extensive Role of Jews in Soviet Communism. Jewish Leadership of GULAGS and the NKVD

Jewish author Yuri Slezkine has compiled near-encyclopedic levels of information in one volume. It examines virtually every imaginable aspect of what is sometimes called the ZYDOKOMUNA (Judeo-Bolshevism). 

I let author Yuri Slezkine speak for himself.