The book On the Road, Dean Moriraty has carried out a good entrance in the beginning of the book. I feel, Dean is the center of this novel because the author, Jack Kerouac describes him more than the main character, Sal Paradise.
Dean has a love affair with two women, Marylou and Camille at the same time. Also, Dean works at the parking – lot attendant, and he has been in and out of jail. Sal describes him as a madman and wild, which makes him like Dean very much because Dean has full of interesting thoughts where he can learn a lot new experiences from Dean. In addition, Sal feels, Dean is his long-lost brother, and admire his uneducated intelligence and enthusiasm. Because of that, Dean comes in handy for Sal to write new experiences for his novels.
I agree, the way the author described Dean more than Sal was an interesting transition, usually we would have started the book out and automatically assumed that it would revolve around Sal not Dean.