Chapter I: http://www.archive.org/details/PreludeToWar
Chapter II: http://www.archive.org/details/TheNazisStrike
Chapter III: http://www.archive.org/details/DivideAndConquer
Chapter IV: http://www.archive.org/details/BattleOfBritain
Enjoy!
Chapter II: http://www.archive.org/details/TheNazisStrike
Chapter III: http://www.archive.org/details/DivideAndConquer
Chapter IV: http://www.archive.org/details/BattleOfBritain
Enjoy!