This is a very basic German learning resource list that I may or may not expand in the future. As a German learner myself, I find these extremely helpful, but I also recommend buying a normal grammar book with exercises. Hueber usually publishes good German textbooks, which are used even in such places as Goethe Institut.
Before the availability of the tape recorder and during the 1950s, when vinyl was scarce, people in the Soviet Union began making records of banned Western music on discarded x-rays. With the help of a special device, banned bootlegged jazz and rock ‘n’ roll records were “pressed” on thick radiographs salvaged from hospital waste bins and then cut into discs of 23-25 centimeters in diameter. “They would cut the X-ray into a crude circle with manicure scissors and use a cigarette to burn a hole,” says author Anya von Bremzen. “You’d have Elvis on the lungs, Duke Ellington on Aunt Masha’s brain scan — forbidden Western music captured on the interiors of Soviet citizens.”