Here's what I remember:
- The main character was a black girl (late teens or early 20's).
- I seem to recall the story takes place in California (maybe the Bay Area).
- The girl is the nexus of some sort of hive mind. She initially connects to six other psychics.
- The psychic powers the characters have include the ability to read/manipulate minds, heal, read psychic imprints from objects and telekinesis.
- The main antagonist is a sort of mental vampire. He feeds of the mind of his victim and takes over the body after he as fed.
- The antagonist bred the psychics because originally they "tasted better".
- The antagonist was originally from Egypt.
The final conflict was won when the protagonist was able to add the antagonist into the hive mind, then drain him.
Finally, I remember the cover had a girl's face on it with a triangle overlaying her face.