The Man of Bronze and his daredevil cousin Pat Savage return in two classic pulp novels by Lester Dent and William Bogart writing as "Kenneth Robeson." First, Doc Savage is accused of serial murders and jailed. Can Pat and Doc's aides help unearth the strange secret of "The Invisible-Box Murders" and prove the Man of Bronze's innocence? Then, Doc journeys to Honolulu after a strange letter makes Pat's friend, Sally Trent, a "Target for Death." BONUS: "The Hang String," a rare 1933 tale by Lester Dent from the back pages of The Shadow Magazine. This double-novel collector's edition leads off with a classic color cover by Emery Clarke, and showcases all of Paul Orban's original interior illustrations and new historical commentary by Will Murray, writer of eleven Doc Savage novels.