Kurt Sutter's worst nightmare just came true and he's not happy about it. The creator of FX's hit show "Sons of Anarchy" went on a lengthy, expletive-filled rant after he learned that the series finale of the show had been accidentally spoiled.

Fans of the show were supposed to receive a "Sons of Anarchy: Collector's Edition Book" after next week's Dec. 9 episode but instead the books came a week early. Typically, people wouldn't be upset about receiving their packages earlier than expected but the book contained major spoilers for the finale.

Along with behind-the-scenes photos from all seven seasons and episode breakdowns, the book also revealed every character that died, including the ones to be killed next week. It doesn't seem like "SOA" fans have leaked the information online, but Sutter is still upset.

"It has been brought to my attention that our SOA Collector's Edition Book has been sent out a week early by some distributors and book outlets," he wrote. "This book contains details about the final episode of the series. This, my friends is a storyteller's worst nightmare. I wanted this book to be a compliment to the show. It contains personal messages and photos from the cast, in-depth behind the scenes information and detailed breakdown of episodes. It's a smart, well-conceived book that I was very excited for the fans to have AFTER the mother**king finale. There are a thousand f**king people I can blame. And I assure you, by the time I am done, my f***king basket will be filled with heads of incompetent s**ts."

"But as far as the fans go, the burden is on me. I f**ked up. It was my idea for the book, so ultimately, I am to blame," Sutter continued. "So if you received a book, I apologize. I ask that you not share your wrath or pain or opinion in social media so as to not spoil the experience of others. There is no excuse for utter ineptitude. It pains me that this will be the parting memory of some fans. I hope you all tune in for the finale. It plays much better than it reads."

In the penultimate episode, "Red Rose," Gemma (Katey Sagal), Unser (Dayton Callie) and Juice (Theo Rossi) died.