SOMEONE ELSE'S MONEY
by Michael M. Thomas
Simon & Schuster; 511 pages; $14.95
The worlds of art and high finance have sometimes seemed inseparable over the past two decades. If the dogged substitution of price for quality has defied good sense and good taste, fiction has been a major beneficiary. Yale-educated Michael Thomas, who at 46 has had successful careers in both milieus (the Metropolitan Museum of Art, Lehman Brothers), has distilled from the darker lunacies of these worlds a novel of crackling humor and mordant observation. Its bigger-than-Barron 's protagonist is Oilman Buford...