$2.99
https://ebooks.faithlife.com/search?query=Brief+insights
Got them, thanks!! My wife has the paper versions but I was waiting for a deal to get the digital.
The ebook editions have just been updated to Logos editions.
Still available for pre order (but certainly not for much longer).
https://www.logos.com/product/176104/zondervan-brief-insights-on-the-bible