Lilith's myth is that she was actually the first woman, created at the same time as Adam. They argued over sexual positions she left Eden. She is then pictured as a demon (she didn't obey Adam) and even ends up as the Queen of Demons,threatening to kill children but at the same time telling how to avoid that from ever happening.
She manifests love and lust and this is part of why she was considered evil. There's a group of L- beings who include incubi, succubi, ghosts and vampires. Their origin story goes back thousands of years at least to Sumeria and possibly even earlier.
Lilith, the book notes, is considered an aspect of female spirituality by some. Related goddesses, some who may be her with another name, include The Great Mother Goddess, Ishtar, Astarte, Isis, Demeter, Hera, Aphrodite, Ceres and Inanna. Lilith is also part of the Epic of Gilgamesh, a very interesting early mythological story.
In a version of the myth Lilith ends up with Samuel who is another name for Satan. That couple can be considered sort of a negative version of Adam and Eve.
In Medieval Christianity giving in to temptation was considered a sin. (This was a way to control the way people thought and a way to make sure the money kept flowing in to the established 'proper' religious channels.)
Starting around the 1700's her image gradually changed from being a monster to being more human in nature. (This also led to various paintings of her nude. Painting female religious figures nude was rather common.)
The book also goes into the relationship between Lilith and astrology, archetypes, the Adam-Eve-Lilith triangle and how men who are rejected for sex can take out their frustrations on women. Aristotle's position on the soul is covered, how men fear being controlled (by women) is also covered and how Lilith appears in modern culture, especially in plays, television shows, books, songs, video games and films.
The book also goes into written references to Lilith which date back thousands of years.
The book is very complete and quite readable.