Der Giftpilz, or, The Poisonious Mushroom was written in 1938 by the infamous Julius Streicher. He was a fervent supporter of Hitler and the Nazi party and a purveyor of anti-Semitic propaganda. Notably, he published the Nazi newspaper Der Stürmer which prominently featured caricatures of Jews as greedy, misshapen, sexual deviants without soul or scruple.
“Just as it is often hard to tell a toadstool from an edible mushroom, so too it is often very hard to recognise the Jew as a swindler and criminal.”
The book aims to inculcate children with anti-Semitism by informing them about the dangerous Jew lest they fall prey to one. It’s an excellent example of propaganda aimed at children. It contains fabricated passages from the Torah and makes many malignant and denigrating if not outrageous claims, e.g., that Jews kidnap children and use their blood to make matzo.
It has been translated to English by neo-Nazi Gerhard Lauck and is for sale on his website along with other like-minded works.
You can buy a reprint in the original German on Amazon.com for $10. They offer a Kindle version as well, with an inexplicably updated cover with new artwork showing the Jews/Mushrooms holding bongs and blunts.
You can download the translated text in various formats here.