The British Psychological society, have just published a new booklet called Understanding Psychosis, which looks pretty comprehensive.
You can download it for free, from their website here
There are contributions from people such as Eleanor Longden, Jacqui Dillon, John Read, Rufus May, quotes from many people involved in the Hearing Voices Network around the world.
HEARING VOICES NETWORK AOTEAROA NZ 
Thank you for this post, good material to have.
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