Gail Sheehy's brilliant road map of adult life shows the inevitable personality and sexual changes we go through in our 20s, 30s, 40s, and beyond. The Trying 20s -- The safety of home left behind, we begin trying on life's uniforms and possible partnersin search of the perfect fit. The Catch 30s -- illusions shaken, it's time to make, break, or deepen life commitments. The Forlorn 40s -- Dangerous years when the dreams of youth demand reassessment, men and women switch characteristics, sexual panic iscommon, but the greatest opportunity for self-discovery awaits. The Refreshed (or Resigned) 50s -- Best of life for those who let go old roles and find a renewal of purpose.