The Heroes of Olympus series marches onward. Spoilers ahead for the Percy Jackson series and the earlier books in this one.
The Argo II is sailing, which leaves Annabeth nervous. Getting in touch with another set of demigods when the gods had deliberately separated them and rendered them ignorant of each other's very existence is not an encouraging prospect.
Judo-flipping Percy for having gotten lost was not perhaps the most prudent greeting, but things are going fairly well until Leo opens fire on the camp. They manage a narrow escape, with the demigods they came for, and Leo has no notion why he did it. The Romans, unsurprisingly, go to war.
So, we have a book filled with mad flights whenever an eagle shows up, at least as long as they are in America. We also get Aphrodite waxing romantic about Fort Sumter, twins with no dress sense, a BIG sacrifice (literally), two gods madly in love, the differences between Diet Coke and Diet Pepsi, which reflect Bacchus and Dionysus, an acquairum, combat use of a cornucopia, a ichthyocentaur who teaches important house-keeping skills, and a heroic sacrifice in order to be together.