What is the author's tone in HITCHCOCK by Helen G. Scott?

The tone used in "Hitchcock" by Francois Truffaut is one of relative objectivity. This is very difficult to achieve when discussing something as subjective as film. Truffaut definitely has his opinions, which may or may not agree with that of Hitchcock. However, the approach tends to be that of one professional speaking to another, detailing the processes of filmmaking, the techniques used, the actors and crew involved, and the state of the film industry at the time. Even though the men had differences of opinion regarding certain films, the tone always remained friendly and even tempered. It is unclear if Truffaut withheld some of his usual criticisms, but it seems that the tone of the interview was straightforward and honest.