Analysing the beginning of a novel

The narrative does begin 'in media res' (the reader doesn't get any background information -> plot has already started) and it goes up to page 38.

At first Miles and his parent are in Florida and his mother is going to organise a farewell party for her son, because he wants to go to a boarding school in Alabama.
At Culver Creek Miles mets his roommate Chip, called Colonel, and the beautiful girl Alaska. Miles got his nickname 'Pudge', but in fact he is the opposite of pudgy.
And in one night some boys played a bad prank on Pudge.