"I have a clear sense of history, I just don't know whether it is mine," writes DeBaggio in this moving and unusual memoir. The author, who has previously written about his gardening business (Growing Herbs from Seed, Cutting and Root), documents his mental deterioration from Alzheimer's. Diagnosed with the disease in 1999 at the age of 57, DeBaggio undertook this project in order to increase awareness of this devastating illness from a patient's point of view. He describes how his gradual loss of memory has impacted his life. For example, after he became confused about how to get to his niece's house, he realized he had to give up driving a car. The increased loss of language has been extremely difficult for a man who once worked as a journalist and a freelance writer. Interspersed throughout the narrative are DeBaggio's recollections of his childhood—events that may soon be lost to him. He also describes the disease's negative effect on his wife and grown son. Although DeBaggio provides information on the medical advances that are being made to treat this disease, it is clear that a breakthrough will come too late for him. With this rare first-person account, DeBaggio has made a significant contribution to literature on an illness that currently affects four million Americans. (Mar.)