Tim Tebow -- Miracle Wins Translate Into Book Sales

Doing the Lord's work really pays off -- not only is Tim Tebow 6-1 this season with God by his side, but sales of his book have skyrocketed since Tebowmania swept the nation.

Tebow's book, "Through My Eyes: A Quarterback’s Journey," came out on May 31 and enjoyed solid sales, but returned to the best seller list three weeks ago ... reaching as high as #8.

HarperCollins Senior Vice President Lisa Sharkey told the NY Post, "We have to go back to reprint practically every day."