The crew of Soviet space station Salyut 7 investigate an unexpected visitor. For comments or questions, email . Listen to Lina's labor news podcast and find Johnny's show Subversive History on his  Talk with other listeners in the . Music used in this episode can be found at . The pdf of version 1.5 of Matryoshka: Cosmic Horror Investigation in the Cold War USSR can be downloaded at . It's pay-what-you-want, so if you want the book but have nothing, you are just as welcome to the book as anyone.