The Revenge of Ishtar (The Gilgamesh Trilogy)

In this second volume in the Gilgamesh trilogy, Enkidu joins Gilgamesh in the quest to slay Humbaba, the monster who has attacked the city and caused great destruction, including the death of the beautiful singer, Shamat. Gilgamesh and Enkidu successfully slay the monster and in so doing, Gilgamesh attracts the attention of the goddess Ishtar. In rejecting her advances, he incurs her revenge and an attack by the Bull of Heaven. Enkidu manages to kill the bull, but is slain by Ishtar, striking at the bond between the two friends. Shattered, Gilgamesh vows he will destroy the last monster: death.