A sinister plot to destroy America is unleashed when a man is killed outside a New York skyscraper -- by falling up! Doc Savage blasts into action, only to discover that two of his trusted aides have vanished! To save them and the nation, Doc alone must risk his life in a horrifying arena of torture, blood and murder!

I had high hopes for this one (pardon the pun) but unfortunately it didn't measure up. The mystery and action were great but the "falling up" trick turning out to be a trick killed this one for me. I know it's part of the formula for Doc but this one really needed a real mystery. Great except for the ending.