Get the latest free books from David C. Cook: The Legacy Builder by Rod Olson and When Your Husband is Addicted to Pornography by Vicki Tiede. Both are available at Amazon and Vyrso/Logos; however, the Vyrso link is not up for Addicted to Pornography, but you can get it here. Vyrso also has many other free books here.
Monergism continues to post free e-books including Covenant Theology by J. Ligon Duncan, The Crown and Glory of Christianity by Thomas Brooks, On Meekness and the Quietness of Spirit by Matthew Henry, Survey of OT and NT by Machen, Precious Remedies Against Satan’s Devices by Thomas Brooks and more.
Logos has brought the pre-pub price of the highly anticipated, updated 5 volume New International Dictionary of New Testament Theology down to $159.95 which is still higher than I would like but more in line with the $125 price Zondervan is offering the print set for when it releases later this year.