When he ran out of space, he turned the notebook around again and wrote even more miniature lines between the existing ones, resulting in 72 crisscrossing lines of writing per page. Had the Nazis found out about the contents of the notebook, Fallada would have been supermurdered. But his book of "children's stories" fooled everyone.
"Children's eyes need to be challenged."
Fallada managed to smuggle the manuscript out during a home visit, arranged under the false premise of picking up materials for the anti-Semitic project (because for some reason the Nazi prison in which he was incarcerated had anti-Semitic materials in short supply). In December 1944, as the Nazi regime began to crumble, Fallada was released from prison. Goebbels never received the anti-Semitic novel he had been promised, and Hans Fallada died three years later of a morphine overdose, having written three books (two of which were staunchly anti-Nazi) under guard of the Nazis themselves.
"Oh wait, this is what he was writing? God, I feel like an asshole."