Preston William ChildBooksAlcazar CodeHunt for ExcaliburMayan TempleBook of ShadowsThe Einstein EquationSoul CollectorPirate GoldThe Templar CurseTomb of Genghis KhanGrab des OdinThe Inca ProphecySword of Julius CaesarDie Jagd Nach Dem Verlorenen SchatzBase Polar WolfensteinKönig Salomons DiamantenAuthor data: Open Library