Callum Knight

The Secrets of My Spectrum

A heartfelt first-person account helping parents, teachers and autistic readers understand what autism really feels like—through lived experience, not medical jargon. 


✓ Understand their child's anxiety


✓ See autism from their child's perspective


✓ Recognise sensory overload


✓ Start meaningful conversations


✓ Help autistic children feel understood and less alone


✓ Build stronger relationships


✓ Gain practical ideas for everyday life


 Edición en español 


Click here for 'More Secrets of My Spectrum' [Book 2]

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 Loved by Readers Worldwide 
"It really helps to see through the eyes of someone with ASD." 
"This book should be read in every school." 
"It is the first autism book my son has wanted to engage with."

Written by autistic author Callum Knight when he was just 16 years old, The Secrets of My Spectrum became an Amazon #1 bestseller and continues to help families, educators and autistic readers around the world.


  Available in 

📖 Paperback

📱 eBook

🎧 Audiobook

🔤 Large Print

✍️ Signed Copies

Why Callum wrote this book

 After being diagnosed autistic at 13, Callum discovered that many books explained autism—but very few explained what it actually feels like to live with it every day.


At just 16 years old, he decided to change that.


Instead of medical definitions and complicated terminology, Callum shares his own experiences with honesty, warmth and clarity, helping readers see the world through autistic eyes.

Discover Callum's honest experiences of:


• Sensory overload and shutdowns


• Stimming and self-regulation


• Anxiety and navigating social situations


• Special interests and passions


• Education and growing up autistic


• Friendships, communication and empathy


• What helped—and what didn't


• Reflection pages after every chapter for your own notes and thoughts


This book is ideal if you are:


✓ The parent or carer of an autistic child


✓ A teacher, teaching assistant or SEN professional


✓ Newly diagnosed and looking to understand yourself better


✓ Supporting an autistic teenager


✓ Looking for an autism book written by an autistic author


✓ Searching for an easy-to-read guide without medical jargon


What Readers Are Saying

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" This book is very good and helps me understand my daughter's autism."

 — Paula  (Parent)


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"Thank you, Callum. This book has been so important for my 13 year old son and I. It is the first book about autism he has wanted to engage with, and it has really helped us have open conversations. "

 — RW (Parent)


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" I got this book after hearing about it on social media. I have been reading it every night with my 7-year-old, who is autistic, specifically with Pathological Demand Avoidance. He has found it very reassuring that other children have felt the same as him, and I find it invaluable to understand how he views the world. As he grows into a teenager, it will really help him. Great book. "

 — Mrs T Flower  (Parent)


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"It is an insightful resource that would greatly enhance the quality of support and understanding and foster greater inclusion. Thank you."

 — Brian, Autism Support Community 

eBook

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Audiobook

Narrated by Nick Denton

 

Two Author Signed Paperbacks

£16.99

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Author Signed Large Print

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 Ideal for readers who prefer larger, clearer text, including many dyslexic, visually impaired and neurodivergent readers. 


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Posted from the UK

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Get personal updates from Callum and Ethan, behind‑the‑scenes stories, and early access to new books. Stay connected with autistic voices and the family behind the Spectrum series.

More Secrets of My Spectrum

Continue Callum's Journey

After sharing his experiences as a teenager, Callum returns to tell the next chapter of his story. 


More Secrets of My Spectrum

Discover Callum's experiences of:


• Becoming an adult

• Building independence

• Employment

• Relationships

• Mental health

• Growing in confidence


Perfect for readers who enjoyed The Secrets of My Spectrum and want to continue the journey.

View Book 2

Autism Family Notebooks

Notebooks to say thank you to loved ones, created by Callum

take a look

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On the Bus

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The PDA Effect

 A gentle, interactive story about autism that includes a colouring page and a fun spot-the-difference activity to encourage discussion and engagement. 


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Book Details

The Secrets of My Spectrum

ISBN (Paperback):  978-1916258600 

Page count: 154  

Publication date: Dec 2019  

More Secrets of My Spectrum

ISBN (Paperback):   978-1917514187 

Page count: 165 

Publication date: Dec 2025  


These books are available at the British Library