Jack: The Great Seducer by Edward Douglas Harper Entertainment, $76 When the French Minister for Culture, Jack Lang, made Jack Nicholson a commander in the Order of Arts and Letters in 1990, he said: 'Your angular eyebrows, your ironic smile, your taste for exaggeration have etched out characters who are memorable, sometimes satanic.' That's not a quote from Jack: The Great Seducer, but some other lump of bio-pulp. But it sums up this sometimes surprising actor. He was on a rerun of Saturday Night Live the other weekend with Helen Hunt, his co-star from As Good As It Gets, and the comics took turns doing Jack impersonations. He arched an angular eyebrow and the audience cracked up. Everyone loves a clown, especially the French. Even Jerry Lewis has a ribbon. Is Jack Nicholson the great seducer? Once you knock off the 83 pages of bibliography, sourcing and index, you get a flight-length 322 pages you can either believe or not about Nicholson's loves and losses, as culled from the National Enquirer et al - he said she said he said. Please return your seat to the upright position.