Sylvester, coauthor of The Gene Age ( LJ 11/1/83), summarizes for the general reader the very latest research on how a human gene might go awrygaining a deadly immortality. His book offers a competent definition of cancer and describes sophisticated biological concepts by magnifying cellular structures and activities in an effective ``theater of the mind'' technique. There are also insights into the ways experiments are designed and conducted, a discussion of the conflicts between research and clinical goals, and engrossing personal accounts by cancer victims. It is unfortunate that parts of the book are disjointed, confusing, and digressive. Careful revision could have made this good book an excellent one. Laurie Bartolini, formerly with Lincoln Lib., Springfield, Ill.