Battles of the Dark Ages

I thought I'd give this a try on the Kindle as I'm in an early medieval frame of mind at the moment, what with all that Gripping Beast plastic sitting on the shelves above the workbench. It's had iffy reviews on the historical accuracy front but it should be an interesting read nonetheless, especially as it is written with the wargamer in mind. I'll see what it's like before I make any rushed judgements....it is the so-called 'dark ages' after all...?