The Obsidian Tower

The Obsidian Tower is driven by Frantic Protagonist Syndrome - the heroine, Ryx, rushes from bad decision to worse decision, impelled by an entirely artificial sense of urgency. It's obviously the planned start of a series, so a whole lot (a whole lot) of questions are left open, and very little is resolved in the end - I would be kind of interested in some of the answers, but not enough to endure another installment.