User blog comment:Darkcloud1111/''The Mark of Athena'' Plot Holes/@comment-3146930-20121016174032

Actually, here is one that most of use wouldn't consider a plot whole. Rick Riordan in his blog said that the scene on the cover of the book would happen in the book. Was it in the book? Well yes and no. The image shows Jason on Tempest and Percy on Blackjack about to clash with water behind Percy and thunderclouds behind Jason, with a large owl watching them. Just a few things to point out.
 * 1) At no point in the battle did Percy control water.
 * 2) Athena only appears once in a flashback and is never said to be watching the fight. If anything, those should be the eyes of Gaea, as her Eidolons caused them to fight in the first place.
 * 3) While Jason does summon lightning, he did this after Tempest ran away. I guess you could say that Tempest is making the clouds, but I don't think so.
 * 4) And lastly, there is a bolt of lightning in the background, once like I said before, there wasn't any lightning until after Jason was knocked off Tempest.

Not really a plot hole or incorrect information, but now that I see it, it kind of annoys me.