I tracked down the old covers for side by side comparisons.
Book 1: https://www.amazon.com/Lost-Pirates-Book-Jamie-Hawke-ebook/dp/B0C34GRN3V
Book 2: https://www.amazon.com/Shadow-Time-Lost-Pirates-ebook/dp/B0C34WVSMG
Book 3: https://www.amazon.com/Storms-Rising-Pirates-Jamie-Hawke-ebook/dp/B0C34TWRNM