Oneiromancer by Joshua Jones

Peter Miller's brother Andy dies under suspicious circumstances. Peter's mother is advised by a psychic named Sybil that Andy's death was a suicide and they should let Andy rest. His mother agrees and wishes to close the police investigation. However, Peter will not let it go and is aggravated by Sybil's interference.

Peter thinks the only way to get his brother's case reopened is prove to his mother that Sybil is a sham, so he goes undercover to investigate the world of psychics. The investigation leads him to a psychic development center called Remote View. During this time Peter has a bizarre dream that warns him of an impending danger.

While at the facility, he has a dream again but it proves not to be a dream. It is a contact from another dimension telling him about a conspiracy that could ruin humanity and Peter must stop it. One big problem is that the head of the Remote View center is involved with the inter-dimensional plot. Oneiromancy is the divination of dreams and sometimes bad dreams come true.