I'm not a huge Wilbur Smith fan, but I remember some folks upthread were, so...
The Eye of the Tiger is a non-series title by Wilbur Smith. It has dropped to $1.99 at Kindle and Kobo US.
Kindle US:
https://www.amazon.com/Eye-Tiger-Wil...dp/B078B84FXZ/
Kobo US:
https://www.kobo.com/us/en/ebook/the-eye-of-the-tiger-8