Behrend - Your Invisible Power - New paperback or softback - 67 - X555z

Bounds - Power Through Prayer - New paperback or softback - 29 - X555z

Behrend - Your Invisible Power - paperback or softback - 87 - X555z

Diyaolu - Invisible Seeds - New paperback or softback - X555z

Mungall - Invisible Hand of Power - New paperback or softback - X555z

Holmes - Your Invisible Power - paperback or softback - 08 - X555z

Power - Glory - New paperback or softback - 29 - X555z

Simpson - Invisible Friends - New paperback or softback - 29 - X555z