He gets involved in defending East Anglia against a Mercian invasion and in doing so comes up against his old enemy Wybert. The East Anglian's lose the battle although our hero is rescued and ends up back home after a few diversions, but I won't spoil the story. There is a parallel story of events back at his own lands.
We know very little about this period, but the invasion was real and the decisive battle was possibly fought at what is now known as The Devil's Dyke or St Edmund's Dyke.
If you have read my reviews of the first three books in the series, you will know I am a big fan. I like my hero to be gritty and flawed, and that is certainly the case with Beobrand. There will be more in the series - I look forward to them.
Time to give this period a go on the tabletop. I decided on a Northumbrian v Picts battle using Lion Rampant rules.
Beobrand wasn't even phased when a giant cat threatened to intervene on the side of the Picts!