13 uniform volumes including: Hungry As the Sea - The Sound of Thunder - The Dark of the Sun - The Sunbird - The Diamond Hunters - Cry Wolf - Gold Mine - Shout At the Devil - Sparrow Falls - A Falcon Flies - The Eye of the Tiger - Men of Men - Eagle in the Sky. Publishing dates range from 1965 to 1981under both the Edito-Service and Heron Book imprints. All appear unread or very gently read. Interiors are clean and unmarked. All volumes have a yellow ribbon book mark. Bright, gilt titles to spine, bright gilt stamped decorations over publisher's faux leather boards. Corners are lightly bumped. Odd small scuff and or very minor shelfwear to show. Without dustjackets (as issued)? "Cry Wolf" has a thin vertical crease to the fore-edge and one page creased on the interior.