BANGOR (AP) – Halloween is looming but horror writer Stephen King hopes there’s nothing scary about the ending to his new book.

King and Stewart O’Nan, both Boston Red Sox fans, are collaborating on a book that chronicles the 2004 season as the Sox seek to reverse the “Curse of the Bambino” and win their first World Series since 1918.

The two authors became friends because of their love of the Sox, and O’Nan said he’ll be disappointed when it all ends.

“The best part is going to the games with Steve and following the team so closely day by day,” he told the Bangor Daily News. “The worst thing is … the season’s going to be over. I don’t want it to end.”

With Boston holding a 3-0 lead over the Cardinals heading into Game 4 Wednesday night in St. Louis, it appeared that the book will have a happy ending for Red Sox fans.

Their book, “Faithful,” will no doubt be a hit with Red Sox Nation, a group of fans that has remained faithful for decades even as their talented team failed to win the ultimate prize.

Amazon.com is taking advance orders for the book, which is expected to be released in December.

The Amazon Web site shows the book’s cover, which features a photo of catcher Jason Varitek shoving the Yankees’ Alex Rodriguez. Publisher Charles Scribner’s Sons plans a first printing of 500,000 copies.

King and O’Nan have been going to games together for a couple of years and they’ve been keeping diaries this season. Ironically, neither made the trip to St. Louis, and O’Nan was said to be busy writing on Wednesday. King also was too busy with other projects to discuss the book, his office said.

King came about his love for the Sox by growing up in Maine; O’Nan became a fan at Boston University and now lives in the suburbs of Hartford, Conn., the line where Red Sox Nation thins out and New York Yankees loyalties emerge.

King is becoming a fixture at Fenway Park, where he has been interviewed several times during national baseball broadcasts.

King, winner last fall of an honorary National Book Award, has written horror classics such as “The Shining,” “The Stand” and “Carrie.” O’Nan’s works include “A Prayer for the Dying” and “The Night Country.”