Here you go:
https://www.logos.com/free-book-of-the-month
Also
https://verbum.com/monthly-sale#free
and
https://ebooks.faithlife.com/free-book-of-the-month
And this:
¡Descarga un Libro gratuito! (logos.com)
Available Now
Build your biblical library with a new trusted commentary or resource every month. Yours to keep forever.
