Fangs and Swords Book Three: The Blood of the Supernatural

A war is brewing. Arcadius is rising, and the demigods and supernaturals on the Argo II must stop him and the giants in Athens before they bring hell to earth. To do so, they must enlist the help of a powerful pyromancer who hasn't been seen for years. They're also being hunted by those who would use the blood of a vampire, a witch, and a werewolf to help raise Arcadius himself.
Stef and Andrew have been tasked with bringing the Athena Parthenos to Camp Half-Blood, but Arcadius's lackeys, the Sirens, stand in their way. Can they outwit them and the giant Orion to stop a battle that's practically begun? Plus, they'll have to face some of their own...

Stuck on the front lines, Josie, Eliza, and Zach must stop the growing power of the Hollow who roams Camp Half-Blood's woods, kidnapping demigods and serving Gaia. They must also free the supernaturals captured by the Roman army, while staving off first blood between the two camps.
Can the supernatural and demigod worlds coexist during battle, or will their enemies turn them against one another?