I don't think there's any great mystery to writing female characters, so long as you talk to them. If you lived in a monastery and never met any women, maybe it would be difficult.
WorksWinter Of The World; Fall Of Giants; Night Over Water; Lie Down With Lions; On Wings Of Eagles; The Man From St. Petersburg; The Key To Rebecca; A Place Called Freedom; The Pillars Of The Earth; Code To Zero; The Hammer Of Eden; World Without End; Hornet Flight