Are you the Fallback Girl? If you've ever found yourself in a relationship that feels and seemingly looks like one, but you're struggling with commitment, or you've been in the ambiguous territory of a "casual relationship", you've likely tried to change them, wondered what you did to cause this, what you can do to win their love and commitment, or even whether you're going crazy.

Mr Unavailable and the Fallback Girl is the definitive guide to understanding the relationship between emotionally unavailable men and the women who love them. From explaining how and why they blow hot and cold to where that future they promised went to, how you've ended up being a booty call, why you've been together for a gazillion years but aren't going anywhere, and more importantly how and why you're involved with them in the first place, all of the answers are here.

You know you're dealing with unavailability when you ask stuff like: What happened to that great guy from the beginning? Why won't he break up or stay away if he doesn't want to commit? What the hell did I do to make him disappear? Is he going to leave her for me? It's because he's shy/busy/scared of his feelings, isn't it? Inspired by the real-life adventures in unavailability of Natalie Lue and the readers of her site, BaggageReclaim.com.

Mr Unavailable and the Fallback Girl is an empowering, entertaining, and inspiring read that will wise you up to pitfalls such as men who aren't over their exes, Future Fakers, guys who have more baggage than a Heathrow terminal, and reappearing childhood sweethearts. If you want to understand your own availability and why commitment in a healthy relationship is eluding you, Mr Unavailable and the Fallback Girl is your guide to being available and attracted to healthy, available partners.

Back in the summer of 2005, Natalie Lue was a single advertising executive wondering out loud on her blog why she had a penchant for unavailable men. Using her site, BaggageReclaim.com, to answer that question while transforming her life, her blog has become a go-to source for understanding emotional unavailability, commitment, dating, relationships and self-esteem while inspiring many thousands of people to change their own relationship habits.