Book excerpt: Another great book of puzzle-solving challenges at a popular price! Ripped right from the pages of the Los Angeles Times comes the 19th installment of crosswords from some of the nation's top constructors. They're entertaining, and a great value: not only are the crosswords more mainstream and fun than the ones in The New York Times, but each book contains a generous 72 puzzles--not the mere 50 of competing volumes. The stay-open, lie-flat, specially reinforced spiral binding makes it easier to work on the puzzles anywhere, too.