Over at christianaudio.com, Handel’s Messiah: Comfort for God’s People is available for free download. I’d encourage you to take advantage of this free download. I’ve never read the book, but Handel was a musical genius and the Messiah is one of the great musical masterpieces of Christian music.
The author of this book, Professor Calvin R. Stapert, has answered several questions concerning why he wrote the book, what’s so great about Messiah, and many others at Justin Taylor’s blog.