The Book of Taltos (Vlad Taltos #4-5 omnibus)
In a world where other races live centuries, human Easterner Vlad narrates. Loiosh, fatally venomous jhereg dragonet, distracts and attacks from assassin's shoulder.
4 Taltos - Thief Kiera teaches, gives him vial of goddess blood. Philanderer wastes assassin wages on girls. Morrolan and vampire Sethra trick him to fetch their ancestor Aliera from gods in the Halls of the Dead. Goddess Verra helps.
5 Phoenix - By order of patron Demon goddess Verra, Vlad assassinates King of Greenaere island, where sorcery does not work, provokes war. Drummer Aibynn may be a spy, but Morrolan and Aliera rescue all. Wife Cawti supports rebels and rejects lovelorn Vlad. Kragar keeps business going. Dragonet Loiosh has mate Rocza.