Title of book in which Robert F. Kennedy survived assassination attempt and became president, and forty years after as well.?

[I'm going to ignore the "and forty years after as well" part of your question because it's almost meaningless--except to point out that you have available _500 characters_ in the "Details" section when you post your original question, plus many (perhaps unlimited) chances for an "Update". So you could have explained clearly what you tried to indicate in too small a space.]

According to https://en.wikipedia.org/wiki/List_of_fictional_Un... you might mean _A Disturbance of Fate_ by Mitchell J. Freedman or _If Israel Lost the War_ by Richard Z. Chesnoff, Edward Klein, and Robert Littell. Or not.

no