Worthwhile Books Facebook page, but since this sale is good until April 10th, I thought I'd put them here too.
Harper Collins Christian Publishing has many titles on sale for spring.
Beyond Opinion by Ravi Zacharias - 99 cents
Amplifed Bible - 99 cents
Hands-free Mama - 99 cents
Bittersweet by Shauna Niequest - 99 cents
Charles Spurgeon devotional book - 99 cents
There are some Max Lucado titles and Christian romances too.
The full list of 22 titles is at Gospel E-books.