The Palace Job by Patrick Weekes

The most powerful man in the republic framed her, threw her in prison, and stole a priceless elven manuscript from her family.

With the help of a crack team that includes an illusionist, a unicorn, a death priestess, a talking warhammer, and a lad with a prophetic birthmark, Loch must find a way into the floating fortress of Heaven's Spire–and get past the magic-hunting golems and infernal sorcerers standing between her and the vault that holds her family's treasure.

It'd be tricky enough without the military coup and unfolding of an ancient evil prophecy–but now the determined and honourable Justicar Pyvic has been assigned to take her in.

But hey, every plan has a few hitches.