Struck with Parkinson's - a debilitating, degenerative disease - at the height of his fame, Fox has taken what some people might consider cause for depression and turned it into a beacon of hope for millions. Now, in ''Always Looking Up'', he writes about the personal philosophy that carried him through his darkest hours, and speaks with others who have emerged from difficult periods with optimism to spare. With the humor and wit that dazzled fans and reviewers alike in his bestselling memoir, ''Lucky Man'', Fox shows how he became a happier, more satisfied person by recognizing the gifts of everyday life.