With a wealth of stories gleaned from his long career as a rural and suburban police officer, the Karrinyup resident also has a story or two to tell from his often-tumultuous private life.
After his son Greg, who had a mental disability, died at 37 years old, Mr Primrose contributed an article to a newspaper about the struggles associated with his upbringing.
It was the government's announcement in 1996 that it was going to cut back on financial support to disability services that prompted Mr Primrose to put pen to paper, leading to a writing career.
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READ NOW"The editor of the newspaper at the time asked me why I wasn't writing more," he said.
Mr Primrose has since contributed many articles to newspapers and magazines and now has five published books under his belt, his latest titled Francene the Frog.
Mr Primrose said you did not need a university degree to write or chase your dreams, and he is living proof.
"I don't have a degree, you don't need one " just have faith in yourself,� he said.
"My message is also that you can still chase your dreams when you get to my age."
Anyone interested in purchasing a copy of the book for $15 can email bobsbook@bigpond.net.au or call 9446 4383.