THE SARACEN BLADE (406 pp.)Frank YerbyDial ($3.50).
During the siege of St. Marcel in the year 1212, says Frank Yerby in The Saracen Blade, a dead horse was mounted on a trenchbut. This instrument, a huge catapult, flung the horse clear over the city's parapets and dropped it in the public cistern.
Novelist Yerby has done some catapulting himself. Beginning with The Foxes of Harrow, and repeating the performance with five successive novels, Yerby has mounted a vast, turgid body of prose on his publisher's publicity engines. Each time it has made a bull's-eye on the bestseller lists.
This time Yerby's missile is dressed...