Whiz Tanner and the Mysterious Countdown

It's summertime in Jasper Springs! Amazingly (or not) it's summertime in New York City where the agents of the Tanner-Dent Detective Agency are visiting Whiz's Uncle Wilson. What could interfere with a nice city vacation? A dropped book for one thing--but not just any book. It was a Jasper Springs Library book. And ... inside it held a secret! Who would lose a Jasper Springs Library book in New York City? What was the secret? Agents M and K are hot on the trail in the Big Apple to begin sol...