The River Warriors (Savage Isle series, 2) - Hardcover – by Michael Arnold 
 
The Romans have landed in Britain. The invasion is over, but the resistance has just begun.
 
The legions march inland, but progress is slow, hampered by vast, ancient forests, swamps and treacherous rivers that must be crossed. But, guided by traitorous Celts blinded by self-interest, progress they do.
 
Marshalling the fractious tribes, High King Tugodubnos plans the first major battle for the only fording point of the mighty Vaga River.
 
Meanwhile, Cullen, now a warrior of renown, is dispatched by Aoife the Dread to seek out a mystic religious totem - the whetstone of the smith god, Gobannos - which could help unite the bickering clans.
 
But will he be able to find the stone and return it to Aoife before the two great armies clash?
 
The compelling second novel in the Savage Isle series, from the author of the Stryker Civil War novels.