I'm reading this series because I like the idea, but I've found much better stories of girls masquerading as boys to get where they want to be. Cynthia Voigt's Jackaroo for one, and The Bloody Jack series by L.A. Meyer, for a little different take (historical, rather than fantasy). The Dark Horse series by Mary H. Herbert is another, if memory serves, for young adult fantasy audiences, with a young woman taking her brother's identity to revenge her clan's annihilation. 
 My problem with this series is that so much ground is covered in so short a time that it feels bare bones, very little flesh. Maybe I wouldn't care if I was a kid, but a good story deserves a good treatment. This isn't it.