Who is Scaramanga from The Man with the Golden Gun and what is their importance?

Scaramanga is the titular "man with the golden gun", portrayed throughout the book as cold-eyed and cold-hearted, a mercenary and ruthless killer whose focus in life, and in the trail of death he leaves behind as he lives that life, is on money and profit. Chapter three contains a detailed description of his character, a description he lives up to throughout the book—although it must be said that the conclusions drawn by the report about Scaramanga's sexuality remain, for the most part, undeveloped in the action.