An impassioned defense of zoos, a death-defying trans-Pacific sea adventure à la "Kon-Tiki," and a hilarious shaggy-dog story starring a four-hundred-and-fifty-pound Bengal tiger named Richard Parker: this audacious novel manages to be all of these as it tells the improbable survivor's tale of Pi Patel, a young Indian fellow named for a swimming pool (his full first name is Piscine) who endures seven months in a lifeboat with only a hungry, outsized feline for company. This breezily aphoristic, unapologetically twee saga of man and cat is a convincing hands-on, how-to guide for dealing with what Pi calls, with typically understated brio, "major lifeboat pests."