Here are the most recent international versions of the Son of Neptune that I've received! It's always interesting to see how different publishers market the books around the world.
Above, the Finnish edition. The Finns decided the American cover art worked for them.
The complex Chinese edition above takes the concept and does their own spin on it.
And the Indonesians get creative with their own cover design, above, featuring Hazel, Frank and Percy zipping away on a chariot, with Arion on the lead.