Lamb decided to try writing a book after her 40th birthday, and enrolled in a children's writing course with Masterton novelist Shirley Corlett.
"There were only three of us, and the others dropped out. But I took it really seriously -- every week, I wrote and wrote."
She completed her first manuscript and, after many rejections, applied for a mentorship through the New Zealand Society of Authors.
Though Lamb was ready to "put the whole thing to bed," she was delighted to be mentored by well-known teen fiction author Fleur Beale.
With Beale's guidance, and a shortlisting for the Storylines Tom Fitzgibbon Award for unpublished children's writers under her belt, Lamb regained confidence, and approached Makaro Press.
In the book, Summer lives with her grandfather, whose miserly ways and outlandish schemes are a constant source of humiliation.
Summer is outraged when a mysterious woman wins her granddad's affections -- so seeks the help of "witchy poo" Flora from the local crystal shop, gothic friend Apple, and sophisticated greyhound rescuer Juanita.
Much of the book is inspired by Lamb's personal experience -- Summer's granddad is based on her "ultra stingey" stepfather and the setting on her rural upbringing.
"People here will recognise it -- the school bus, the bridges, the cold snap in lambing season, the flooding in the blink of an eye.
"A lot of my characters come from observing and people-watching. I'm introverted -- I think and watch more than I speak. "
Lamb said the book has many themes children can relate to, such as self-esteem, loyalty and false friends.
"When you're that age, there's such a social hierarchy at school. Like a lot of young people, Summer learns how to accept herself when others do not. Basically, it's about the embarrassment of adolescence."
The Discombobulated Life of Summer Rain is available for sale at Almo's Books in Carterton.