From Stephenking.com:

Ghost Brothers of Darkland County, (Hear Music/Concord Music Group), the long-awaited southern gothic supernatural musical from co-conspirators Stephen King, John Mellencamp and T Bone Burnett, will be released as an illustrated digital book created and designed especially for Apple's iBooks on June 3rd, 2013. Blending the special project’s Stephen King-penned libretto, original songs and lyrics written by John Mellencamp, excerpts of key dialog along with interactive video, sound effects and graphics, the digital book will provide readers a one-of-a-kind immersive experience into this extraordinary collaboration.
A stellar cast of guest artists including Elvis Costello, Rosanne Cash, Sheryl Crow, Neko Case, Taj Mahal, Ryan Bingham, Will Dailey and Kris Kristofferson, along with actors Matthew McConaughey, Samantha Mathis and Meg Ryan perform the book’s songs and audio excerpts. In an historic note, the Ghost Brothers of Darkland County digital book edition is Stephen King’s very first digital book conceived and designed especially for Apple's iBooks in the legendary author’s long and illustrious career.

You can pre-order it from Apple HERE.

Here's the trailer for the book:

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