 When Sweets was observing them and writing a book on their relationship, Dr. Gordon Wyatt noted that Booth and Brennan are actually more similar despite appearing to be polar opposites – both experienced traumatic childhoods, are highly competent in their respective fields and extremely guarded about their personal lives.Although they maintained their different views after becoming a couple, they are shown to be very protective and trusting of one another.Booth often takes Bones along to his investigations and interrogations, despite his superiors' and Caroline's initial reservations about a "squint" being in the field.