The Shadow's premier agent Harry Vincent takes center stage in two thrilling pulp novels by Walter B. Gibson. First, the Master Avenger investigates "Doom on the Hill" after Vincent summons him to track down a serial killer in one the series' greatest murder mysteries. Then, The Shadow follows a winding trail "Clue for Clue" as he searches for Nazi diamonds, while Harry Vincent finds romance with an enemy agent! This double-novel collector's edition showcases the classic color pulp covers by George Rozen and Graves Gladney plus the original interior illustrations by Tom Lovell and Paul Orban, with historical commentary by Will Murray.