The Son of Neptune (Heroes of Olympus, Book 2)

The Son of Neptune - Rick Riordan Having read all five books in the 'Percy Jackson (Lightning Thief)' series and the first one in this, the 'Heroes Of Olympus' series, I think I've got a pretty good hang of all the various Greek gods and goddesses, and their powers, weaknesses, alliances, etc. Now, this book switches to the Roman aspect of the gods, and I have to pick up on the 'equivalent' of the Greek version. Good read but does end with a little bit of a cliff hanger -- which made me delve right into the third book 'The Mark Of Athena' (which fortunately, has already been published).