The "Long War" series is Cameron's second historical series, also published by Orion in the UK. Cameron's series covers the Persian Wars from the first-person point of view of a historical figure, Arimnestos of Plataea. The first book, "Killer of Men" (published in 2010), is named after Achilles, the man-killer of the Iliad, and covers in first person the early life of Arimnestos and his participation in the Ionian Revolt. The next installment of the series is "Marathon" (published 2011), which culminates in the titular battle. "Poseidon's Spear" (2013) covers the five years after Marathon and is a more personal tale of adventure, exploration and revenge across the western Mediterranean and Atlantic Europe. "The Great King" (2014) has Arimnestos partake in Sparta's diplomatic mission to Persia and ends with the Battle of Artemisium. "Salamis" (2015) covers the titular battle and "The Rage of Ares" (2016) ends the series with the battles of Plataea and Mycale. In addition to the battles, the series also features aspects of life in ancient Greece, such as smithery, farming and sailing, and historical figures such as Heraclitus, Aristides, Gorgo and Xerxes.