Dr. No is the sixth novel in Ian Fleming's James Bond series, first published in the UK by Jonathan Cape on 31 March 1958. The story centres on Bond's investigation into the disappearance in Jamaica of a fellow MI6 operative, Commander John Strangways and his secretary, Mary Trueblood. He establishes that Strangways had been investigating Dr. No, a Chinese operator of a guano mine on the Caribbean island of Crab Key; Bond travels to the island to investigate further. It is on Crab Key that Bond first finds Honeychile Rider and then Dr. No himself.