In The Son of Neptune, Percy, Hazel, and Frank met in Camp Jupiter, the Roman equivalent of Camp Halfblood, and traveled to the land beyond the gods to complete a dangerous quest. The third book in the Heroes of Olympus series will unite them with Jason, Piper, and Leo. But they number only six--who
gnat_a shared a tip "That's actually the 3rd book in the series but I definitely recommend reading it! I really enjoyed it!"
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