It's definitely worth the price. The author originally intended to read the original words of the Bible to know exactly what God had to say. During his researches and schooling, however, he came to realize the original words were long lost and it would be difficult to recreate them from all the different versions of Scripture that have come down through the ages (he mentions one of the early researchers in this field compiled 30,000 variations in the New Testament alone from only 100 different manuscripts).
It's a fascinating read as he weedles out what the original Scriptures may have said and explains why they were changed over the centuries (politics, typos, whatnot).