The World Wreckers By Marion zimmer bradley Books / Paperback Special Collections / Author Archives › Barbara Mertz Collection Publisher: Ace Books, January 1971 Price $13.89 Free Shipping Send to a friend Collectible - Good Collectible - Good. Barbara G. Mertz Rev Trust custom bookplate on front inside cover. This book formed part of Barbara G. Mertz's personal library at her home in Frederick, Maryland. (Science fiction, scifi, sci fi, vintage science fiction, Darkover series, epic fantasy) $13.89 1 in Stock at Warehouse Quantity Add Free Shipping to continental U.S. OR $1.00 per item discount if shipped to store.