The Secret Keepers: packed full of dangerous mystery, twists and turns, and secrets around every corner, from the critically acclaimed author of the Mysterious Benedict Society series.

When Reuben discovers an old pocket watch, he soon realizes it holds an incredible power: it can turn you invisible for fifteen minutes.

He can't resist the lure of disappearance: for a time, he can vanish from the despotic regime of New Umbra. But the watch's power is even more extraordinary than he imagines.

Soon, he's on the run from New Umbra's ruler, The Smoke, who's determined to possess it for himself ...