text: Blofeld is absent from the next novel, The Spy Who Loved Me, though its events take place while Bond is battling SPECTRE in North America. In On Her Majesty's Secret Service (1963), Bond learns that Blofeld has altered his appearance radicallyhe is now tall and thin, having reduced his weight to ; sports long silver hair, a syphilitic infection on his nose, and no earlobes; and he wears dark green tinted contact lenses to hide his distinctive eyes. Perhaps less calculating than previously, he is notably saddled with the exploitable weakness of snobbery about his assumed nobility, indicating that he is losing his sanity. He is hiding in Switzerland in the guise of the Comte Balthazar de Bleuville and Bond defeats his vindictive plans to destroy Britain's agricultural economy (implied to be carried out on behalf of the Soviet Union). In the final sequence of the novel, Blofeld gets revenge by murdering Bond's new wife, Tracy.
  In You Only Live Twice, published in 1964, Blofeld returns and Bond finds him hiding in Japan under the alias Dr. Guntram Shatterhand. He has once again changed his appearance. He has put on some muscle and has a gold-capped tooth, a fully healed nose, and a drooping grey mustache. Bond describes Blofeld on their confrontation as being "a big man, perhaps six foot three (190 cm), and powerfully built." It is indicated that Blofeld has by now gone completely insane, as he all but admits himself when Bond levels the accusation. Bond strangles him to death in a fit of rage at the end of the novel (something that he had done only once before, to Auric Goldfinger).