As a child McGuirk was told repeatedly by adults and teachers that she had no talent as an artist. Despite the negativity, and with no training in art, she began selling whimsical T-shirts out of the back of her car and eventually became a famous designer in Japan, and an author and illustrator of over 20 children’s picture books which have sold over two million copies worldwide. She credits an astrologer, she went to at age 19, for putting her on her true path as a writer and illustrator. McGuirk believes being untrained and "wrong" has been the number one reason for her creative success, and knows that taking an awkward and intuitive path can lead to tremendous personal and creative success.
Her first adult book comes out in September 2016 with Harper Elixir, an imprint of Harper Collins entitled The Power of Mercury. This book helps people understand what astrology is really meant to do (which is not to be a fortune telling devise) but rather an amazing tool to help understand our internal wiring.
McGuirk has been studying astrology for over 30 years. She teaches regularly at Rancho La Puerta spa, in Tecate Mexico, as well as many other high-end spas, and resorts. In the corporate world, she has been a popular keynote speaker on the topic of creative inspiration.