Hardcover in original first printing dustjacket. Last title listed on the front flap is The Clue of the Broken Blade preceded by The Mystery of the Flying Express. 1942A-1 first printing, 5050 printed on front flap. Binding is firm and square with bright lettering. Bump to upper corners. Top edge stained blue. Bottom edge with small spots. Orange pictorial endpapers. No marks or inscriptions. Dust jacket with closed tears, chipping at spine ends and corners, wear along edges, mild soiling to back cover, tape repairs on the inside. Dustjacket protected with mylar sleeve. 218 pp. 19 x 13,5 cm.