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Published in 2008, the three books definitely do their own thing in regards to cover art. But if you look closely, each cover includes a special identifier besides just color and number.
Within each of those Young Bond police badges is a unique image. Book 1, SilverFin, shows an image of Bond and Wilder on a horse (also used on an earlier Chinese edition); book 2, Blood Fever, shows a pirate ship; and book 3, Double or Die, has what appears to be a cemetery.
I wasn’t able to turn up a copy of Hurricane Gold on the site.