The Amazing Adventures of Kavalier & Clay

The novel begins in 1939 with the arrival of 19-year-old Josef "Joe" Kavalier as a refugee in New York City, where he comes to live with his 17-year-old cousin Sammy Klayman. Joe escaped from Prague with the help of his teacher Kornblum by hiding in a coffin along with the inanimate Golem of Prague, leaving the rest of his family, including his younger brother Thomas, behind. Besides having a shared interest in drawing, Sammy and Joe share several connections to Jewish stage magician Harry Houdini: Joe (like comics legend Jim Steranko) studied magic and escapology in Prague, which aided him in his departure from Europe, and Sammy is the son of the Mighty Molecule, a strongman on the vaudeville circuit.

When Sammy discovers Joe's artistic talent, Sammy gets Joe a job as an illustrator for a novelty products company, which, due to the recent success of Superman, is attempting to get into the comic-book business. Under the name "Sam Clay", Sammy starts writing adventure stories with Joe illustrating them, and the two recruit several other Brooklyn teenagers to produce Amazing Midget Radio Comics (named to promote one of the company's novelty items).

Synopsis from Open Library.