The Witch Who Came In From The Cold (Ian Tregillis) Books in Order

The Witch Who Came In From The Cold is a collaborative spy fantasy with a very specific kind of pressure. It takes place in Prague in 1970, after the Prague Spring has been crushed and Soviet power hangs over daily life. The streets are full of diplomats, informants, defectors, and watchers. Beneath that visible Cold War, a hidden magical war is unfolding.

Prague is where every secret has to travel carefully.

The main human conflict follows Gabe Pritchard, a CIA operative, and Tanya Morozova, a KGB officer. They work for opposing intelligence services, but both are also drawn into the struggle between Ice and Flame, rival occult factions with their own plans for the world. Their work is complicated by missing memories, shifting missions, and the constant possibility that a useful contact is really someone else's asset.

The magic does not make the spy story less grounded. It sharpens it. Elementals, hosts, rituals, artifacts, and creatures such as golems become part of the same atmosphere as dead drops, surveillance, forged papers, and coded messages. People are still trying to protect themselves and the people they care about, but the rules are harder to see and the consequences can reach beyond politics.

Ian Tregillis is one of the writers contributing to the serial, alongside a larger team. That format gives the story an episodic pace, with individual operations and viewpoints feeding into one larger plot. A chapter may focus tightly on a surveillance job or a negotiation, then reveal another layer of the contest between intelligence agencies and magical factions.

Trust is in short supply.

Season one introduces the city, the rival powers, and the people caught between them. Season two carries forward the consequences of earlier bargains and puts more strain on loyalties that were already unstable. Read the seasons in order, beginning with The Witch Who Came In From The Cold: Season One, because the alliances, personal losses, and political stakes build from episode to episode.

The tone is tense rather than flashy. This is a series for readers who like Cold War tradecraft, compromised agents, and supernatural elements that feel dangerous instead of decorative. Its central question is simple, even if the answers are not: when every side wants something from you, what part of yourself can you keep?