"She was one of Whanganui's real characters. She was a domestic servant who fell on hard times, and her life was quite well documented by both the Wanganui Chronicle and the Wanganui Herald.
"The community seemed to have a real soft spot for her, on the one hand. On the other hand, she was the bogie man and parents would tell their kids to behave or 'Granny Dalton will get you'."
Mr Crawford said after one accidental fire, students from Wanganui Collegiate built Granny Dalton a hut, which sat approximately where the London St roundabout is now.
"For years, Carlton Ave extension was known as Granny Dalton's Lane."
Mr Crawford said actual quotes from the two newspapers helped steer the story, which is nonetheless a fictionalised account of Granny Dalton's life.
Granny Dalton and the Firebug will be released at The Rutland Arms at 11am on July 23. All welcome.
The book is available from Amazon, Rangitawa Publishing, and local bookshops.