
If you're a parent supporting an autistic child — or an autistic teen wanting to feel understood — this bestselling book offers a real, first-person perspective.
Written at just sixteen, The Secrets of My Spectrum is Callum Knight’s bestselling debut — a candid, jargon-free exploration of life on the autism spectrum. Diagnosed at thirteen, Callum brings readers into his world with short, heartfelt chapters that illuminate everyday realities: sensory overload, shutdowns, stimming, anxiety, and the complexities of social life.
Whether you are autistic yourself, supporting a child, or working in education and care, this book provides:
Callum’s writing is not about clinical definitions or easy fixes. It’s about clarity, connection, and the everyday truths of growing up autistic. Warm, relatable, and highly rated by parents, teachers, and the autism community, The Secrets of My Spectrum continues to inspire readers worldwide.
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Why Readers Love It
This book had everything I needed to have confirmed about autism, from a child's prospective and could have been written about my granddaughter.
I got this book on my kindle and I found it a really good read. I care for my 13-year-old grandson, and I’m always looking for books and articles that give me a wee bit better insight into his ASD. I find that if I cherry-pick from all that I read, it helps me understand a wee bit better. I would recommend this book even if your child’s on a different part of the spectrum; you might just find something that can help you and your child.
I enjoyed reading this book by Callum Knight.
I purchased the large print as the normal size print wasn't available and I wanted to support Callum's recommended purchasing route.
I think this book should be read by everyone, especially Teachers.
My grandson is on the spectrum and very much like Callum I wish someone had written a book like this 17 years ago, as I looked after my grandson while my daughter worked it was so hard. It took 9 years to get a diagnosis and then nothing, I had to keep putting the book down as I cried and was so emotional
Thank you Callum I think you are a very brave young man.
Have already told others about this book, very interesting & helped understanding about different issues I have experienced with someone I know.
Found this book very useful and opened up a few doors I thought were closed.
This was a very helpful insight into Asd as I try understand and support my ten-year-old grandson.
Have just started reading this book in the hope that I will get an insight into autism from someone who has grown up and lives with it. My aim is to learn as much as I can from those who are living with and finding ways to manage their unique experience of the condition.
I have a teenage Son who has ADHD and ASD. This book was completely relatable to him and really helped him understand he isn't alone. Huge well done to the Author.
It’s was great to get and insight to my son’s mind and explains how and why .
So glad I read it and look forward to many more from this great author ✍️
Linda
Very well written.
Callum has written a brilliant book helping not only others on the spectrum but people like me I’m a grandma who’s grandson has many of the same challenges and understanding it from his prospective is so insightful - it has changed so much knowing the signs to look out for to calm him. Well done to Callum for sharing his experiences.
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Paperback
The Great British Bookshop (TGBBS)
Competitive Delivery
We aim to offer competitive delivery worldwide!
Environmentally Friendly
We only print the books when you order them!
Secure payments
A secure payment gateway for your peace of mind.
TGGBS have a 30-day return policy
Large Print
£9.95

Autism into Adulthood
The follow-up to Callum's best-selling book is OUT NOW
ISBN (Paperback): 978-1916258600
Page count: 154
Publication date: Dec 2019
ISBN (Paperback): 978-1917514187
Page count: 165
Publication date: Dec 2025
These books are available at the British Library