The Dark Avenger and Harry Vincent share center stage in two thrilling tales of lost treasure by Walter Gibson writing as "Maxwell Grant." First, The Shadow and his ablest agent journey to Michigan timber country in a thrilling tale of deadly avarice, betrayal and a forgotten gold mine. Then, a supercrook preys upon aristocratic refugees from the Spanish civil war, leading The Shadow into a deadly dual with The Masked Headsman. This instant collector's item showcases both classic pulp covers by George Rozen, the original interior illustrations by Tom Lovell, commentary by popular-culture historian Will Murray plus "The Shadow Around the World." (Sanctum Books) Softcover, 7x10. 128 pages, B&W, $14.95