In what was arguably the darkest period in the history of France, the lights at theaters, cinemas and cabarets in Paris never gave up their glow.

During the four years of World War II in which France was under Nazi occupation, artists painted; musicians and singers performed; fashion designers turned out haute couture; and novelists, poets and playwrights produced work at a pace that reflected the City of Light's renown as a cultural beacon and a place where intellectuals were held in high esteem.

As author Alan Riding explains in "And the Show Went On," his broad-ranging book about cultural life during the occupation, it was in the interest of conqueror and vanquished alike that such pursuits be allowed to continue. For the German occupiers, the cultural activities offered a distraction for the Parisians and themselves; the French kept their culture alive, which provided a source of pride after the crushing defeat of their once-vaunted military.

The book includes solid examinations of the prewar and postwar cultural milieu, but the heart of Riding's work focuses on how many of the leading figures in the arts and letters coped with life under the Third Reich.

Some writers with Fascist leanings applauded the 1940 outcome and collaborated with the Nazis. A handful were executed in a spasm of vengeance that followed the liberation four years later, but others had their prison sentences commuted during the postwar period as the French sought to minimize the extent of such collaboration.

Louis-Ferdinand Celine, regarded as one of the greatest French writers of the 20th century, had fled to Denmark amid accusations of treason but was later granted amnesty. He returned to France and was back in business with his old publisher. "For many French citizens, his pro-Nazi and anti-Semitic delirium was simply overshadowed by his genius," writes Riding, a longtime European cultural correspondent for The New York Times.

Riding's detailed and well-researched account is sure to appeal to Francophiles, admirers of French culture and readers seeking to heighten their understanding of an emotionally charged and morally complex aspect of World War II. More than that, it offers insights into the ethical dilemma that many of France's luminaries faced during a critical time in their nation's history and the different ways in which they chose to respond.

"And the Show Went On: Cultural Life in Nazi-Occupied Paris" (Alfred A. Knopf, $28.95), by Alan Riding.