The Drowning City (Necromancer Chronicles 1)

The Drowning City: home to exiles and expatriates, pirates and smugglers. And violent revolutionaries who will stop at nothing to overthrow the corrupt Imperial government. For Isyllt Iskaldur, necromancer and spy, the brewing revolution is a chance to prove herself to her crown. All she has to do is find and finance the revolutionaries, and help topple the palaces of Symir. But she is torn between her new friends and her duties, and the longer she stays in this monsoon-drenched city, the more intrigue she uncovers - even the dead are plotting. As the waters rise and the dams crack, Isyllt must choose between her mission and the city she came to save.