User blog comment:Cello freak/Should the Kane chronicle's world and Percy Jackson's world exist side by side?/@comment-68.81.75.86-20110926023606

They already do. It is implied in both books that they exist in the same world. In the first book, when Amos is questioned why they do non live in Mountbatten, Amos states that manhatten has it's own problems and it's own gods. Then in the second book, Carter claims to have seen a flying horse over manhatten.