When you complete the following survey of 8 pages, you can choose one book for free:
https://www.logos.com/recommendation
* M. Heiser, I dare you not to bore me with the Bible
* Lexham Bible Guides: Genesis 1-11
* 40 Days to the Cross
* 300 Quotations for Preachers
* Vocabulary of the Greek Testament
* Spurgeon, Galatians
Many of these have been free before. Please check your library before you select one.