R. L. Stine is the master of young adult horror!

The 71-year-old author, known for his haunting book series "Goosebumps" and "Fear Street," took to Twitter on Wednesday to share a special Halloween story with fans. And in true Stine fashion, the story (told in the form of 15 tweets) was absolutely creepy.

I am going to try to write a story live on Twitter now. The story is called "What's In My Sandwich?"...

— R.L. Stine (@RL_Stine) October 29, 2014

After announcing the Twitter story, Stine proceeded to churn out a expertly composed tale that is sure to raise the hair on the back of anyone's neck.

People call me a loser, but that's going to change. I was in a little diner downtown and I ordered an egg salad sandwich… — R.L. Stine (@RL_Stine) October 29, 2014

..I was about to bite down on it when I noticed something moving in the egg salad. Was I imagining it? No…

— R.L. Stine (@RL_Stine) October 29, 2014

..I saw a hairy, three-fingered claw push a clump of egg out of the way. I saw two round black eyes. A fur-covered face… — R.L. Stine (@RL_Stine) October 29, 2014

..The creature poked out of the sandwich, sending egg salad tumbling onto the plate. It was the size of a fat beetle…

— R.L. Stine (@RL_Stine) October 29, 2014

..But it wasn't an insect. It had a furry head and eyes that peered into mine. Before I could react, a second creature poked out… — R.L. Stine (@RL_Stine) October 29, 2014

..And then a third. My sandwich was infested. My stomach lurched. "Is everything okay?" the waitress asked…

— R.L. Stine (@RL_Stine) October 29, 2014

.."Yes. Fine," I said. "Could you wrap this sandwich to go?" Finding hairy things in your sandwich is gross… — R.L. Stine (@RL_Stine) October 29, 2014

..But I knew this sandwich would make me a winner. The sandwich would turn my life around…

— R.L. Stine (@RL_Stine) October 29, 2014

..Discovering a new life form had to make me rich. I carried the sandwich home carefully and set it on a table… — R.L. Stine (@RL_Stine) October 29, 2014

..I didn't hear my son Willy come home. When I finally saw him, he had egg salad on his face…

— R.L. Stine (@RL_Stine) October 29, 2014

..Yes, he ate the sandwich. If only I could have stopped him. Now the creatures are biting holes in his stomach… — R.L. Stine (@RL_Stine) October 29, 2014

..They are biting holes in Willy from the inside, poking their furry heads out of his stomach, chewing his flesh…

— R.L. Stine (@RL_Stine) October 29, 2014

..Okay. A minor setback. But I'm not giving up. Willy is screaming in agony. The poor guy is terrified… — R.L. Stine (@RL_Stine) October 29, 2014

..I'm so excited. Where is my camera? Willy is going to make me rich. ##

— R.L. Stine (@RL_Stine) October 29, 2014

In addition to finding amazing ways to be creative on Twitter, Stine is also releasing a few new spooky projects in the days leading up to Halloween.

Stine recently penned a new film based on his "Mostly Ghostly" YA series that will air on the Disney Channel on Wednesday night. The movie, entitled "Mostly Ghostly 2: Have You Met My Ghoulfriend?" stars Ryan Ochoa and Bella Thorne. It centers around Max (Ochoa) who only has eyes for the popular girl at school, Cammy (Thorne), and is shocked when she agrees to go on a date with him. Max is forced to put the evening on hold, however, when an evil ghost unleashes a number of ghouls on the town in an effort to take over the world.

He also released a new "Fear Street" book called "Party Games" on Oct. 1.

Still can't get enough Stine?

The author will also make an appearance at the McNally Jackson Bookstore in New York City on Thursday night (Oct. 30) at 7pm. According to a tweet Stine wrote about the event, he will be accompanied by his "Fear Street" editor Kat Brzozowski.