Original sentence: Owain appears as a minor character in novels of Sharon Kay Penman concerning Henry II and Eleanor of Aquitaine ("When Christ and His Saints Slept" and "Time and Chance")
Edited sentence: Owain appears as a minor character in novels of Sharon Kay Penman concerning Henry II and Eleanor of Aquitaine ("When Christ and His Saints Slept" and "Time and Chance"), books which have more of an historical quality than those of Peters