<I>Shampoo Planet</I> is the rich and dazzling point where two worlds collide -- those of 1960s parents and their 1990s offspring, "Global Teens." Raised in a hippie commune, Tyler Johnson is an ambitious twenty-year-old Reagan youth, living in a decaying northwest city and aspiring to a career with the corporation whose offices his mother once firebombed. <P> This six-month chronicle of Tyler's life takes us to Paris and the ongoing party beside Jim Morrison's grave, to a wild island in British Columbia, the freak-filled redwood forests of northern California, a cheesy Hollywood, ultra-modern Seattle, and finally back home. On the way we meet a constellation of characters, among them: Jasmine, Tyler's Woodstock mom; Dan, his land-developer stepfather; "Princess Stephanie," Tyler's European summer fling; and Anna Louise, his post-feminist girlfriend with an eating disorder. <P> Tyler's dizzying journey into the contemporary psyche -- a voyage full of rock videos, toxic waste, french-fry computers, and clear-cut forests -- is a spellbinding signature novel for a generation coming of age as the millennium comes to a close.