Snoopy started writing stories on top of his doghouse on July 12, 1965. He always takes a typewriter, and puts it on his doghouse roof, then starts writing saying, "Here's the World Famous Author writing". How Snoopy fits his huge typewriter on top of his skinny doghouse roof, has never been revealed.
The last ever Peanuts comic strip from February 13, 2000 features Snoopy with his typewriter on his doghouse.
Snoopy starts every story the same way, with the words, "It was a dark and stormy night." Lucy and Linus often reread Snoopy's work, and give him suggestions how to fix the story. Snoopy does not make very good use of their suggestions. For instance, in one strip Linus says Snoopy's stories all begin the same way, and tells the beagle he should change that. Snoopy responds by writing, "It was a stormy and dark night." In another strip, Lucy says Snoopy's stories would be improved by having more of a "once upon a time" beginning. Snoopy then writes, "Once upon a time it was a dark and stormy night".
On one Mother's Day strip, Charlie Brown recommends to Snoopy he write a letter to his mother so she knows he hasn't forgotten her. Snoopy writes "Dear Mom, I remember when I was born. It was a dark and stormy night." According to the TV special Snoopy's Reunion, we find out Snoopy was actually right, as we see Snoopy and his siblings were indeed born on a dark and stormy night.
Snoopy often sends his stories off to be published. Unfortunately, the publishers hate his stories and always send him rejection slips. Sometimes, the rejection slips are very cruel and personal. For instance, one says, "We regret to tell you that your story does not suit our present need. On second thought............ Actually we don't regret it at all." Another says "After reading your last story we just have one question. What did we ever do to hurt you?" In the strip from June 18, 1974, it is revealed that Snoopy has enough rejection slips for Woodstock to make a quilt out of. Snoopy manages to get a story published once, in the strip from October 27, 1995. However, nobody buys a copy of it.