The Big Sleep, Differences between the book and the movie

Reading the book and seeing the movie, I noticed a lot of differences. In the book Philip Marlowe treats Vivian Rutledge as forgive the language as a piece of meat. Marlowe not caring about her as much as Vivian throwing herself at Marlowe ; Even laying in Marlowe's bed nude. While in the movie Philip Marlowe played by Humphrey Bogart is smitten with Vivian played by Lauren Bacall. Certain scenes of the movie showed Marlowe admitting the love for Vivian while in the book he could care less. Another example is how the book showed Marlowe as a tougher nails, gritty and take no prisoners bad ass. While in the movie showed another side to Marlowe as a comical, inquisitive, responsible, chivalrous type of man. To honest I feel the book shows us the reader as the real Philip Marlowe while the movie shows us again the audience; water down version of the Marlowe character.