I caught Shelly Gray's A Texan's Promise free on Kindle recently. I was immediately swept into the story from the first paragraph. The story has a great message, and for a good part of the book, a high amount of suspense. To give a complete and honest review though, I'd have to say that the middle lags just a bit when she sends the hero one way and the heroine another. She tries to keep them connected with letters, but to me the level of uncertainty and tension drops considerably. Another brief point I did not care for was when the heroine's brother prays for his deceased mother--which can't do her a bit of good (especially since she committed suicide).
I guess on scale of one to five I'd go for a 3.5. I have book two in the series as well, and I still think I'll give it a try to see if she has learned to improve her storytelling. After all, the writing business is one in which you can never learn enough.