Your phone knows when you're most vulnerable.

When Maya Reyes's ninety-one-year-old grandmother loses $4,100 to a convincing scammer, one detail makes no sense:

The caller knew something Rosa had only said aloud. Alone. In her kitchen.

Maya once helped build the technology inside millions of phones. She knows the company's promise: recordings never leave the device.

The promise is technically true.

The recordings don't leave. The conclusions do.

As Maya follows those conclusions beyond the phone, she uncovers a hidden system capable of turning ordinary moments into something far more valuable: predictions about loneliness, financial stress, uncertainty, routine, trust—and vulnerability.

And those predictions are being sold.

The deeper Maya digs, the more personal the investigation becomes. Because the technology isn't just learning about strangers.

It has been learning about her, too.

The Things Your Phone Knows is a fast-paced psychological techno-thriller about privacy, artificial intelligence, and the terrifying difference between what your devices hear—and what they can figure out.

Some secrets aren't heard. They're inferred.