Fire On The Sands
(Book 4 in The BloodDark Series, this story takes place in the era before the "Olivia Trilogy" of tales.)
Print version available at Amazon.
Greg wants to rescue his friend, kidnapped with him and held somewhere in the City of Night. Adena's okay with that, but she doesn't know something strange lurks in the Oculus Nightingale's cargo bay.
When they reach the City of Night all hell breaks loose. Adena, Greg, and the sentient brass parrot Mr. Phibuli find themselves caught up in the aftershocks of an ancient war - and they have their work cut out for them in order to survive.