I read that book a few years ago. The female character is almost definitely the IC in the classic Dramatica sense, because for most of the book she knows stuff that we don’t know. The guy is the MC as we’re really experiencing the story through his eyes – following him along as he finds out what’s really happening. As I recall, she’s the protagonist, whereas the MC is not.
Another good example that operates in a similar fashion is The Girl With The Dragon Tattoo (both movie and book). Michal (sp?) is the main character – we’re seeing the story through his eyes. Lisbeth is the arguably the protagonist who drives the story. We have scenes from her perspective, but there’s always a sense that we don’t know what she’s thinking the way we do with the other character.