While I love the whole concept behind Rick Riordan's universe, this start of a new series 'Heroes of Olympus' isn't nearly as exciting as Percy Jackson original. Leo is a great character (effectively filling the Grover character slot), but Piper and Jason just don't have the same chutzpah as Percy and Annabeth. 
 I read this immediately after finishing the Last Olympian series, so maybe I had demigod overload, but it didn't make me want to read the next one. I think the shifting POV got a bit tedious, since you don't really identify with a single character.