The book of reality distortions

I'm happy to announce that I've just finalised an agreement with Penguin to write a book on what hallucinations tell us about the mind, brain and human nature. From the proposal:

The mind and brain can generate fantastical visions and disembodied voices, illusory people and shifting landscapes, internal symphonies and sensed presences. These states happen at the extremes of human experience, in madness, terror and brain disturbance, but they are often an exaggeration of our natural tendency...