I read the book in 6th grade (1990-1991.) The book most likely printed mid to late 1980s or early 1990s. Set in modern times in North America/USA. Male lead age 13-15. Junior high or high school student. He finds out one day he can some how summon abilities. Example in the only scene I remember he’s being followed. He confronts his stalker and summons the abilities of a boxer and fights off his stalker. Through out the book he summons skills. Sometimes he can do it other times the power fails. Doesn’t understand how he can do it.
Can anyone help?