Stormie Omartian books in order
7 books in the catalogue, about 31 hours of reading in all; the shortest takes 4 hours and the longest 6 hours.
7 standalone books in the catalogue.
Standalone books
The Power of a Praying Parent 4.1 h 
The Power of a Praying Wife (2 editions) 3.8 h 
The Power of a Praying Husband 4.1 h 
The Power of a Praying Woman 4.3 h 
The Prayer That Changes Everything 5.9 h 
The Power of a Praying® Wife (Power of a Praying) 3.7 h 
The Power of a Praying® Woman (Power of a Praying) 4.7 h