I would recommend "The Conscious Univserse" by Dean Radin.
Simply because all good sceptics should be informed on either side of the debate. You may not agree with the content!
As long as you don't consider it a question of equally valid arguments from each "side of the debate".
While "The Conscious Universe" does not contain any evidence of the paranormal, it is a lesson in how the Superstitious think and argue.
Book Review: Dean Radin, "The Conscious Universe"
An Evening With Dean Radin
Skeptical books worth having:
Flim Flam!, James Randi
The Demon-Haunted World, Carl Sagan
Pseudoscience and the Paranormal, T. Hines
Why People Believe Weird Things, M. Shermer
Missing Pieces: How to Investigate Ghosts, Ufos, Psychics, & Other Mysteries, R. Baker and J. Nickell
Fads and Fallacies in the Name of Science, M. Gardner
Science: Good, Bad and Bogus, M. Gardner
Voodoo Science - The Road from Foolishness to Fraud, Robert Park