Best Espionage Newsletters in 2026

SubstackMonthly or less · last post 53 days ago

Welcome to your clandestine classroom.

Likely audience: History enthusiasts

SubstackSeveral times a week · last post 7 days ago

From recent posts: PunchUp publishes hard-hitting investigative reporting on US politics, national security, and government scandals. The publication covers breaking news on political violence, military justice, and cybersecurity risks…

Likely audience: National security analysts

SubstackEvery two weeks · last post 3 days ago

From recent posts: This article presents a narrative segment from a science fiction story featuring characters Hawke, Jorhan, and Mirek investigating a mysterious transmission from Captain Kieran Voss to a location called Darkhold Station…

Likely audience: Science fiction readers

SubstackEvery two weeks · last post 10 days ago

Fiction that has friction. I will post author interviews, classic book recommendations and my own crime short stories. I am also the co-author of a four-book series that is available in print, audio and ebook formats at…

Likely audience: fans of spy thrillers

SubstackSeveral times a week · last post 11 days ago

Step into the worlds of the Moon Road -- the living road that separates our Earth from the gritty, crime-ridden realms of the fae. Noir fantasy stories, serials and lore with a sci-fi twist from the places where magic…

Likely audience: Sci-fi novel readers