“Tom Swift and His Ultrasonic Cycloplane” by Victor Appleton II

Tom Swift Jr.’s newest marvel is the Cycloplane, a craft powered by ultrasonic energy that can hover, soar, and outfly anything in the sky. But when sinister forces strike, Tom and Bud Barclay must put it to the ultimate test. This is Book 10 of the series, and the hardcover is in good vintage condition at Dead Tree Dreams.