Jeff Sypeck, the man behind Quid plura? and the author of Becoming Charlemagne (which, BTW, is excellent) has recently self-published his translation of the Middle Scots poem The Taill of Rauf Coilyear. Folklore! Chansons! Burlesque humor! Charlemagne getting slapped! I'm sorry, but I don't know what else you might want out of a book. Get thee to that link and check it out!