Book 2: Son Of Neptune
Percy wakes up not knowing anything but two things: his name and another person named Annabeth. He finds a camp with Roman demigods. It sparks a memory but doesn’t seem familiar. He quickly makes some friends and then the god mars comes and orders a quest for Percy and his friends Frank and Hazel. They will have to go to land beyond the gods to unleash the god of death and face down a big monster ready to eat them.
I like this book because it introduces you to the Roman gods and the roman legions. One of my favorite parts was when they were with the rainbow goddess and Frank had to defeat 3 fire breathing snakes… you should only read this if you have read the first book because it ties to it in the series. This is the second book of the five book series.