Chants to Persephone - The Time for Alexander Series

In the fifth book in the Time For Alexander series, the Oracle of Amon tells Alexander he must go to the Land of Ice and Snow, so they leave their home in Alexandria and head north, to Gaul. But the Thief of Souls not only captured Alexander's soul. He also wants Paul, and the druids have raised an army to capture him. In the heart of winter, in ancient Gaul, a terrible sacrifice is made to Persephone, goddess of the Underworld - and Ashley finds herself taking part in a deadly ceremony.