On Her Majesty's Secret Service
"On Her Majesty's Secret Service" is the second book in what is called "the Blofeld trilogy", sitting between "Thunderball", where SPECTRE is introduced and "You Only Live Twice", where Blofeld is finally killed by Bond. Although Blofeld is present in "Thunderball", he directs operations from a distance and as such he and Bond never meet and "On Her Majesty's Secret Service" constitutes his and Bond's first meeting.