Kubick - Principle of Time - New paperback or softback - X555z

Towers - Beverly Duality - New paperback or softback - X555z

Monk - Inflicted Duality - New paperback or softback - X555z

Allen - Alone - New paperback or softback - 63 - X555z

Abercrombie - Duality The Dual Trinity - New paperback or softback - X555z

Shaw - Teshuvah Principle - New paperback or softback - X555z

Anant - Duality - New paperback or softback - 20 - X555z

La Rae - Duality - New paperback or softback - 23 - X555z