The Rhea Jensen Series is written by Sheralyn Pratt. Rhea is pronounced Ray.
Rhea is a young woman living California. Her mother died years earlier from cancer and got her daughter to agree to remain a virgin although the family is not very religious. Her father still lives in the family home and is her biggest champion. Her best friend Kay isn't sure why she choose the job she did, but a friend is a friend.
I have read the first three books in the series and there are more. The first book was excellent and the writing made it easy to read and a quick read. Her boyfriend dumps her, gets another girl pregnant and upset she won't sleep with him. She meets a Mormon missionary and starts taking the lessons. She works as a private eye and does a really good job at it.
Although this is geared towards the LDS/Mormon market, I think anyone would enjoy the first and second book. To me, the third book seemed a little tired and old. After reading the third one I decided I didn't want to read the other books.
The first two books get a 4 1/2 star review while the third book will only get a 3 star review from me. I would definitely recommend the first two books to anyone who likes an adventure with a little romance included. The third book would be up to you. It just kind of went around and around and around.