Paul Preuss is an American writer of science fiction and science articles, who also works as science consultant for film companies. He is the author of numerous stand-alone novels as well as novels in Arthur C. Clarke's Venus Prime series, based upon incidents, characters, and places from Clarke's short stories. (source: wikipedia)
A fairly sub-standard sci-fi story built around the concepts of time travel and multiple universes. Starts out ok, then devolves into a confusing mishmash of personal histories and unexplained motives.