LEAD:
Don Cherry calls Bobby Orr the greatest hockey player ever. He may even be right. Orr is certainly the most enigmatic. Sports writer Stephen Brunt has taken up the challenge of writing the first comprehensive biography of a small-town boy turned superstar who still fiercely guards his privacy in Searching for Bobby Orr. 

RUNS:  5:53

END CUE:  "...published by Knopf Canada."