I've read your book "Percy Jackson Son Of Chaos"
You had a good story there but somethings don't add up..
Like Chaos.. I've read Apollo's trials and almost every Greek history book on their pantheon of Gods and not one mention of Chaos... Or even End
Even though your story might be of fiction but you might do well by further researching..
Also your story lacks details like other books.. For example, in most of the fights you fail to give details and such cause that suspense that causes the reader to hunger for more..
But well I must commend you on your work
Also know that I'm an avid reader and would be delighted if you have more works
Peace out :-)