THE BLUE KNIGHT by JOSEPH WAMBAUGH 338 pages. Atlantic-Little, Brown.
$7.95.
The ten months that Joseph Wambaugh's first novel, The New Centurions, spent staked out on the bestseller list were perhaps less a tribute to the author's literary skill than to the authenticity of his material. Wambaugh was working a rich contemporary vein: the life of the Los Angeles police force, on which he served for more than a decade. Although Centurions brought him an official reprimand for failing to submit his manuscript for advance approval, Detective Sergeant Wambaugh is back with another police...