Who is Anatoly Dobrynin from Thirteen Days; a Memoir of the Cuban Missile Crisis and what is their importance?

The Soviet Ambassador to the United States, Dobrynin promises RFK weeks before the Cuban missile crisis that Chairman Nikita S. Khrushchev intends no trouble preceding U.S. elections. RFK warns Dobrynin that the U.S. is watching and missiles in Cuba will bring the gravest consequences. When U-2 photographs show the Soviets have been lying, U.S. officials disclose nothing initially. Dobrynin is told how the Americans will respond via blockade an hour before JFK's announcement, and is shaken up. RFK visits Dobrynin at the Russian Embassy to review the events that have led to confrontation.