Cameron West, who lives with Dissociative Identity Disorder (DID), revealed childhood sexual abuse by his grandmother. Rikki, West’s wife, helped manage his breakdown and supported their family through his 24 alters. West’s 1999 book, “First Person Plural,” a bestseller, is reissued with a new epilogue. Cameron West’s eyes go somewhere else for a moment.  He’s sitting beside his wife of 45 years, Rikki, in the middle of a conversation about a morning more than 30 years ago. She opened a closet