Doc Savage New Adventure Softcover Volume 07 Phantom Lagoon

"When a brazen adventuress tries to hire Doc Savage for a secret mission - but won't tell him why - it lights the fuse for one of the most explosive exploits ever to involve the Man of Bronze. Who is Hornetta Hale? Why does she need to rent Doc's private submarine? And who is so determined to eliminate her that they destroy Doc Savage's skyscraper headquarters in the process? Based on a 1939 comic strip idea by Lester Dent."