Who are the main characters of the book Avi Called SOR Losers?

The main characters of "Avi Called SOR Losers" are Avi, a young boy who joins the Summer of Reading program (SOR) to impress a girl, and his friends, Brian and Bear. Avi's determination to win the program leads to humorous and unexpected adventures as they compete against their rival team, the Pages. It's a fun and quirky read that will have you rooting for the underdogs!