In the introduction to the book, it reads:
"We invite all men everywhere to read the Book of Mormon, to ponder in their hearts the message it contains, and then to ask God, the Eternal Father, in the name of Christ if the book is true. Those who pursue this course and ask in faith will gain a testimony of its truth and divinity by the power of the Holy Ghost. (See Moroni 10:3-5)"
Elder Jeffrey R. Holland, of the Quorum of the Twelve, adds his own testimony of the Book of Mormon in this video.
I add my testimony to that of members everywhere. The Book of Mormon is true. The book testifies of the divinity of our Lord and Savior, Jesus Christ. It truly is the word of God. For those wondering what it's all about, click here to order a free copy.