Doc Savage Double Novel Volume 77 Haunted Ocean & Spook Of Gran

"The pulp era's greatest superhero returns in two chilling novels by Laurence Donovan and Lester Dent. First, bizarre disturbances on the sea floor, the disappearance of an international commission and a power blackout result in the President enlisting Doc Savage to investigate the 'Haunted Ocean.' Then, why is a chemical company owned by Doc Savage providing sub-standard chemicals for the war effort? Doc, Monk and Ham go ghost hunting to solve the strange mystery of 'The Spook of Grandpa Eben.'"