Elina Screen is an established historian of early medieval Europe, with particular specialisms in the Carolingian world. Screen is currently preparing a monograph on Emperor Lothar I (d. 855), on whom she is the leading authority. She is also General Editor of the Medieval European Coinage project and publishes on medieval numismatics. Charles West is a former Humboldt Fellow and AHRC Leadership Fellow. West has published extensively on early medieval topics including historical writing. His monograph, Reframing the Feudal Revolution (Cambridge) was published in 2013, and he has co-edited two books on Archbishop Hincmar of Rheims (d. 882) with Rachel Stone.