The fourth book about the many personalities of the woman portrayed by Joanne Woodward in The Three Faces of Eve. Only now ""Eve"" writes about the integration of all those personalities--a total of 22 in her lifetime--into one healthy and whole human being, the real Chris Sizemore. Sizemore has already written about this integration, this ""cure,"" in I'm Eve (1977). It's not entirely clear why she is writing about it again, except that it is important to her to let the world know that her cure has lasted a decade. The movie had faded out with the implication that the ""Eves"" have disappeared and been superceded by a normal ""Jane."" Not the case. Sizemore went on to suffer the intrusion of many more ""alter egos"" before this final core personality stabilized. Also a great deal has been learned about multiple-personality disorder since Eve in all her personae surfaced in the 50's. An active spokeswoman and lobbyist for mental-health organizations and on behalf of the mentally ill, Sizemore uses the book as a soapbox to broadcast the new information and to promote her laudable interests. Commendable as the cause is, however, ""Eve IV"" is as thin and repetitious as ""Star Trek V"" or ""Rambo III.