The Queen of Ice and Darkness Book Five in the Time for Alexander Series

Book five in the Time for Alexander series finds Ashley and Alexander traveling to the land of the Gauls to find Alexander's soul, which has been stolen. An oracle has foretold that it has been taken by a mighty druid who wants to change time by thwarting the Roman conquest of Gaul. Along with Nearchus and Paul, their son, Ashley and Alexander follow the trail of a mysterious druid, who calls himself 'the Thief of Time'.