Back in March, Stephen King had announced a new book in The Dark Tower series. Titled The Wind Through the Keyhole, this story will take place between the 4th and 5th books. While it ties into The Dark Tower series, it is also being written as a stand-alone novel that is described as a "wonderful introduction to the series".

"For readers new to The Dark Tower, THE WIND THROUGH THE KEYHOLE is a stand-alone novel, and a wonderful introduction to the series. It is a story within a story, which features both the younger and older gunslinger Roland on his quest to find the Dark Tower. Fans of the existing seven books in the series will also delight in discovering what happened to Roland and his ka tet between the time they leave the Emerald City and arrive at the outskirts of Calla Bryn Sturgis.

This Russian Doll of a novel, a story within a story, within a story, visits Mid-World's last gunslinger, Roland Deschain, and his ka-tet as a ferocious storm halts their progress along the Path of the Beam. (The novel can be placed between Dark Tower IV and Dark Tower V.) Roland tells a tale from his early days as a gunslinger, in the guilt ridden year following his mother's death. Sent by his father to investigate evidence of a murderous shape shifter, a "skin man," Roland takes charge of Bill Streeter, a brave but terrified boy who is the sole surviving witness to the beast's most recent slaughter. Roland, himself only a teenager, calms the boy by reciting a story from the Book of Eld that his mother used to read to him at bedtime, "The Wind through the Keyhole." "A person's never too old for stories," he says to Bill. "Man and boy, girl and woman, we live for them." And stories like these, they live for us."

Stephen King didn't originally have the idea for this book when planning The Dark Tower series. He previously mentioned the how the idea for The Wind Through the Keyhole came to be:

“At some point, while worrying over the copyedited manuscript of the next book (11/22/63, out November 8th), I started thinking—and dreaming—about Mid-World again. The major story of Roland and his ka-tet was told, but I realized there was at least one hole in the narrative progression: what happened to Roland, Jake, Eddie, Susannah, and Oy between the time they leave the Emerald City (the end of Wizard and Glass) and the time we pick them up again, on the outskirts of Calla Bryn Sturgis (the beginning of Wolves of the Calla)?

There was a storm, I decided. One of sudden and vicious intensity. The kind to which billy-bumblers like Oy are particularly susceptible. Little by little, a story began to take shape. I saw a line of riders, one of them Roland’s old mate, Jamie DeCurry, emerging from clouds of alkali dust thrown by a high wind. I saw a severed head on a fencepost. I saw a swamp full of dangers and terrors. I saw just enough to want to see the rest. Long story short, I went back to visit an-tet with my friends for awhile. The result is a novel called The Wind Through the Keyhole. It’s finished, and I expect it will be published next year."

The Wind Through the Keyhole and will be available in the spring of 2012. It has been revealed that there will be a limited signed edition of the novel, featuring artwork by Jae Lee. We'll have have more information on the novel and cover art as it gets closer to release.