Mary K (Katherine) Pershall (born 14 March 1951) is an Australian children's author published by Penguin Books.
She writes novels for the tween market, (children of late primary school age), and is most notable for her Two Weeks in Grade Six trilogy, which also includes the titles A Term in Year Seven and Escape from Year Eight.
Mary K Pershall is also responsible for the Ruby Clair series, which depicts a 12-year-old girl's struggle to juggle a normal life with the ghosts she can see.
The series includes the titles Ruby Clair: The Trouble with Ghosts, Ruby Clair: Ghost with a Message and Ruby Clair: A Ghost at School.Most recently, Mary K Pershall has co-authored a novel with daughter Anna Katherine Pershall for the Penguin children's series Aussie Chomps, titled The Dog Stole my Brain.
The funny story follows the adventures of 11-year-old Jake and his dog, Barney, after they accidentally swap brains.
This will be Mary's third publication for the Aussie Chomps series.