Grzelka will answer questions about spirituality and help with real life decisions, possibly changing people's lives and making believers out of die hard sceptics.
His promoters say the moment Grzelka opens the door between this world and the next, anything can happen.
They claim "without fail the departed will come through with a message of love and comfort and pets will also sometimes bound through in the middle of a reading".
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READ NOWThe experience that unfolds is often deeply compelling, occasionally chilling, sometimes humorous but almost always heart-warming.
The predictions made throughout the night will take the audience on an emotional and spiritual journey.
Grzelka stepped into the spotlight more than 12 years ago and rapidly rose to international acclaim, earning him the title "Australia's ghost whisperer".
He was the first medium in Australia to run live events offering readings to an audience and has been touring Australia to sell-out audiences for the past nine years.
He has made television appearances and taken part in radio, magazine and newspaper interviews.
Tickets to his Mandurah show are $65 each and are available at www.whispersfrombeyond.com.au.
n The Mandurah Coastal Times has two double passes to give away.
To be in the running, write your name, address and telephone number on the back of an envelope and mail to PO Box 33 Mandurah or drop it into the office on the corner of Pinjarra Road and Forrest Street by September 4.