People seem to forget that Percy lives in Manhattan. Sure he is a bit busy with demigodly stuff and okay, maybe he isn't the most observant person on the planet...but he isn't exactly going to miss a massive fucking hole in the sky, especially if it has aliens pouring out of it.

A new soul was born in London she lived safely with her family and she is now gonna start her new life , new school and sure she also had to find new friends and here her maze begins