I LOVE opening up for many things, but at the very beginning introduction it talks about watching your partner fuck other people at a sex party, I would make sure that wouldn't put her off before doing that. It almost put me off bothering to read more, since thats not my flavor of poly and it led me to believe it was going to be focused on sex. On amazon
you can read the second page to get somewhat of an idea what it says if you don't own a copy.
aka if she doesn't want to read about ass play when she's trying to figure out what exactly all this poly stuff is about, probably not for her. I'd go with morethantwo myself.