Zondervan’s NIV Application Commentary series is on mega-sale, with each of the ebooks selling at $7.99 in Accordance, Logos, and Olive Tree.
I really liked Psalms vol. 1 in this series. The Genesis, Luke, and Galatians volumes were stand-by commentaries when I preached through those books, too.
Here is where you can find more details on the sale, which Zondervan rarely offers in any other e-format than Kindle:
Accordance // Logos // Olive Tree