Key witness (Red mask mystery) By Roberts, Willo Davis Books / Hardcover Books ISBN: 0399115080 / Publisher: Putnam, January 1975 Price Starting at $17.99 Free Shipping Send to a friend Add to Wishlist Below is a list of products arranged by condition. Select the quantity of the product you desire and click the "Add" button. Collectible - Good First Edition With Dust Jacket First edition copy. Collectible - Good. Acceptable dust jacket. In protective mylar cover. $17.99 1 in Stock at Warehouse Quantity Add Free Shipping to continental U.S. OR $1.00 per item discount if shipped to store. Reviews Goodreads reviews for Key witness (Red mask mystery)