Sci-Fi Book Cover - Dead Reckoning

This is my first ever book cover illustration/design. The story is a super nerdy space traveling adaptation of Men Against the Sea, which is from the Bounty Trilogy, and it's been put together quite well. My brother-in-law and his other brothers finished writing and had this published sometime last spring/summer, however this is my first post about it.
You can READ ABOUT AND BUY IT HERE.