There's a rip in the blue umbrella, and time-and Chelsea-are slipping through! One moment she was there, the next moment she was not, and Ches Cholmondeley was watching when it happened. And he learns of other mysterious goings-on: for three days in a row the world's atomic clocks have lost a second, resulting in bizarre accidents ranging from dropped casseroles to plane crashes. Are these events related? What's a brother to do? Figure out a way to get his sister back, of