 Le Chiffre is a fictional character appearing in a novel in which other authors have written authorised Bond novels or novelizations since what year?
James Bond:  Since Fleming's death in 1964, eight other authors have written authorised Bond novels or novelizations: Kingsley Amis, Christopher Wood, John Gardner, Raymond Benson, Sebastian Faulks, Jeffery Deaver, William Boyd and Anthony Horowitz.
i don't know