Are there any good books like the percy jackson and the olympians seris

Daughters of the Moon series
It is a series about 4 girls later about 5 who find out they are mortal goddess sent from Selene(the moon titaness) to protect the earth from an anicent evil called the Atrox. Vanessa can turn invisanble, Catty can time travel, Sernia can read minds, Jinima has visions & Tinna can move things with her mind the first book is called Goddess of the Night their are 13 books in all

You could try 39 Clues, it's an adventure book. It's not really in the fantasy genre, but it is fiction. Try it out. Or The Series Of Unfortunate Events. Those are good books too.

Maximum Ride! Their books are good! Or read the new series Riordan is writing: "The Kane Chronicles". I read the summary of the book. It's awsome! :D

i agree maximum ride is a good book, but if you like ghost whisper you should read the summoning by kelly armstrong, and the house of night series is a good series even though it is about vampires

mysterious benedict society
alex rider
secret society
artemis fowl
series of unfortunate events

hope this helps :)

Personally I like the Charlie Bone series too. But they're kinda like Harry Potter, you may not like them. Or try Inkheart, Inkspell, and Inkdeath.

Cirque du Freak Saga (The saga of Darren Shan) One of my favorite series! It's about a war between vampires but it is nothing like Twilight!