The 73% figure is based upon the digital list price of $14.99.
This study Bible was published last August. It appears to have brand new study helps, not published in previous study Bibles.
The NIV Zondervan Study Bible: Built on the Truth of Scripture and Centered on the Gospel Message. By Zondervan; D.A. Carson; 3 more. Rated 4.4 stars from 101 reviews at the present moment at Amazon. Print list price $49.99; digital list price $14.99; Kindle price now
$3.99. Zondervan, publisher. 2912 pages.
http://www.amazon.com/NIV-Zondervan-...dp/B00VPSWIGA/.
I checked the price
at Christianbook (ePub, DRM Protected). It is
$3.99 there also. I didn't check elsewhere.
Book Description
The NIV Zondervan Study Bible
, featuring Dr. D. A. Carson as general editor, is built on the truth of Scripture and centered on the gospel message. An ambitious and comprehensive undertaking, Dr. Carson, with committee members Dr. T. Desmond Alexander, Dr. Richard S. Hess, Dr. Douglas J. Moo, and Dr. Andrew David Naselli, along with a team of over 60 contributors from a wide range of evangelical denominations and perspectives, crafted all-new study notes and other study tools to present a biblical theology of God’s special revelation in the Scriptures. To further aid the readers’ understanding of the Bible, also included are full-color maps, charts, photos and diagrams. In addition, a single-column setting of the Bible text provides maximum readability.