Knowing your enemy wins wars, which is why he sizes you up from the moment he sees you. But what he really needs, he can only learn on contact.

So he probes you. A small test to see how you react. Fail the test and you get worked.

No Signal is the discipline of giving him nothing. Read the probe the instant it lands. See what it’s fishing for. Leave him with less than he came for.

Emit no signal and the enemy runs out of moves. So does anyone else who comes to test you.

A small test to see how you react. Fail it, and you get worked.

The military has a name for this discipline: emission control (EMCON). A unit under EMCON goes dark. Radios off, radar cold, nothing radiating that an enemy could lock onto.

No Signal rebuilds that doctrine for the man under scrutiny. It’s a field manual for running emission control in real time: across the table in an interview, an interrogation, a negotiation, or the first thirty seconds with someone who’s already sizing you up.

The manual shows you how to spot a probe, what it’s really testing for, and what to do about it — all without giving a signal. The method is drawn from real operator accounts, including men who held under interrogation when a single word would have killed them.

1. The half-second read that tells you whether to answer at all. Get it wrong one way, you leak. Get it wrong the other, you die.
2. The four things every man reads you for. One he checks no matter what comes out of his mouth.
3. Why the man who explains himself has already lost. Even when every word is true.
4. The three-word answer an SAS man held during a six-hour interrogation after having a rifle shoved in his mouth.
5. The one move that ends a challenge for good. And the one line that hands it right back.