I love this series - except for The Aloha Quilt. That one was just lacking something to me.
I'd say the second one or third one (the one about the first season at the quilt camp) is one of the best in the series, so if you want to get hooked, try that one. The first one is fine, but I remember at the time thinking it was a "nice little story" rather than realizing it was the start of what would become a truly excellent series. If you're not sure you want to continue, start with the one about the quilt camp, then go back and read the others as prequels.