After charismatic king Rhodri Mawr of Gwynedd is killed in battle, people call his son Anarawd's victory over the Mercians at the Battle of the Conwy, a few years later, "God's vengeance for Rhodri".

Rhodri awakened nationalist sentiment among the small Welsh kingdoms at a time when Saxon Wessex threatened the Welsh with dominion. Meanwhile, Mercia never renounced her claim to lands across the Wye and the Vikings threatened the long coastline.

Despite these outside threats, one descendant of Rhodri succeeded in uniting the whole of Wales under his kingship. Find out who in 'Avenging Rhodri', John Broughton's meticulously researched historical adventure set in 9th century Wales.