The topic of 'Unpublished manuscripts' is closely related to the podcast episodes provided, as one episode discusses a scam involving the theft of unpublished book manuscripts from authors and publishers worldwide, while the other episode emphasizes the importance of understanding Marx's unpublished manuscripts, notebooks, and correspondence in gaining a more comprehensive understanding of his ideas.

The episode 'The Last Years of Karl Marx' highlights how Musto's book explores Marx's unpublished materials, which can provide valuable insights into his personal life, intellectual pursuits, and theoretical developments in his final years. Similarly, the episode 'The Book Bandit' focuses on the theft of unpublished book manuscripts, a central element of the bizarre scam discussed.

Understanding the role of unpublished manuscripts in these podcast episodes can shed light on the significance of such materials in the literary and intellectual worlds.