What Are the Percy Jackson Books About ... Over the original series and two sequel series The Heroes of Olympus and The Trials of Apollo, the world has expanded massively bringing new characters ...

Nico and his sister Bianca first appeared in The Titan’s Curse, where Percy and his friends are ... in the subsequent books (across the Heroes of Olympus and Trials of Apollo series).

has no choice but to use his powers for good and trek across America with his friends to restore order to Olympus. Riordan's books were first adapted on the big screen in 2010's Percy Jackson ...