Willie Nelson is joining an elite group of artists in two new projects: a charity album called 'The Imus Ranch Record' and a book about horses called 'Horse Country: A Celebration Of Country Music And The Love Of Horses.'

Nelson's love of animals led to the involvement with the latter, along with Tanya Tucker, Eddie Montgomery, Charlie Daniels, Hal Ketchum, Brad Paisley, Chris Cagle, Heidi Newfield, George Jones and several other musicians. The book is set for release on October 14.

The country legend is also a part of controversial radio personality Don Imus' 13-track collection of remakes of well-known standards and some more obscure material. The Dinah Washington hit 'What A Difference A Day Makes' is Nelson's selection on the CD that is to be released September 16, with proceeds going for children with cancer.

The Imus Ranch Record' Track List:

'Silver Springs' -- Patty Loveless (best known version is by Fleetwood Mac)

'Lay Down Sally' -- Delbert McClinton (original by Eric Clapton)

'Mamas Don't Let Your Babies Grow Up To Be Cowboys' -- Lucinda Williams (original by Waylon Jennings & Willie Nelson)

'You Better Move On' -- Levon Helm (originally by Porter Wagoner & Dolly Parton)

'Life Has Its Little Ups And Downs' -- Raul Malo (originally by Charlie Rich)

'I Ain't Never' -- Little Richard (originally by Webb Pierce)

'I Don't See Me In Your Eyes Anymore' -- Randy Travis (originally by Charlie Rich)

'(You Gotta) Fight For Your Right (To Party!)' -- Big & Rich (originally by the Beastie Boys)

'What A Difference A Day Makes' -- Willie Nelson (original by Dinah Washington)

'Give Back The Key To My Heart' -- Dwight Yoakam (original by Doug Sahm)

'What Happened' -- Bekka Bramlett (Bekka's original demo of song recorded by Gretchen Wilson)