My Recommendation of Fictional Books Part 2

Hello once again for the second part for the recommendation of books that i like. Before, i only introduced on series my favourite author, Rick Riordan (You can learn more about him on rickriordan.blogspot.com for more info) and today, i'm going to introduce the second series that also features Percy Jackson and his mates and camp;
Heroes of Olympus 
This book series is kind of special, no main narrator like the Percy Jackson series, and about every three chapters, the book will change it's character it is mainly on and it would be written in three characters in each book. So far, there are three published books of the five book serie. The fourth book will be out this october on Oct 8. The fourth book is named House of Hades, you can read the first chapter if you go on the website stated above.
The first three books are namely The Lost Hero, The Son Of Neptune and The Mark Of Athena. The first book ( which honestly i haven't read all yet) is based on three heroes, Jason Grace, Piper ( his girlfriend) and Leo Valdez (his best pal). All of them are demigods that are rescued from an evil Gaia (or Gaea, but she's a devil that all the heroes of the prophecy of seven will face later)spirit by our old friends of Camp HalfBlood.Jason had also lost his memories of the point that he is the praetor of the Roman camp at the other side and the fact that he's a Roman demigod. 
Piper is a daughter of a hollywood star and the daughter of Aphrodite(or Venus). Leo is the son of Hephaestus and loves making all sorts of things. He found a lost mechanical dragon which he called Festus. The story also includes our Know it all heroine Annabeth chase which claims that Percy, his boyfriend was lost for about three days and keeps asking about his location. They go on a quest ( like always).
To the Son Of Neptune, it's facing on Percy Jackson( who also lost his memory but only remembers Annabeth and her face), Hazel Levesque ( daughter of Hades or Pluto) and Frank ( a son of Ares or Mars). This is based on the Roman Camp ( not sure but maybe SPQR) and the adventure they take that secrets unveil and how Percy gets his memories back ( i shouldn't tell more or everything exciting will get spilled out by my tapping hands). 
The Mark Of Athena, which you may have guessed is based on Annabeth,Percy and the rest of the troop (not all). The seven of the prophecy reconcile. Really romantic and adventurous. This is a must for the fans.
So i guess you got it, this is more on Romans but also some Greeks. It's a must have series for the fans of Percy Jackson. Really, really nice. Take my advice on the books of Rick Riordan and you won't regret it!