
BOOK 2 - Just released
Following the success of his bestselling debut, The Secrets of My Spectrum — written at just sixteen years old — Callum Knight continues his journey in More Secrets of My Spectrum: Autism into Adulthood. With the same heartfelt honesty that captivated readers worldwide, this sequel explores what it means to grow up autistic, moving from teenage years into adult life.
Reflecting on his experiences up to the age of twenty-one, Callum shares candid insights into education, independence, and self-employment, alongside the challenges and triumphs of navigating adulthood on the spectrum. His reflections are practical, deeply relatable, and filled with moments of discovery.
Whether you are autistic yourself, supporting a loved one, or working in education and care, this book provides:
Accessibility & Editions
Callum’s story is not about perfection or easy answers. It’s about resilience, discovery, and the everyday realities of living authentically. Just as his debut gave comfort and clarity, this new book offers hope and encouragement for anyone seeking to understand autism beyond childhood.
I work with young children with Autism & am always wishing they could explain how they feel. This has given me answers to some of the questions I wonder about. Thank you. — Tracey Martin
When we say listen to autistic people, Callum’s book is one of those voices — authentic, inclusive, incredibly kind and open‑minded. He is, without doubt, becoming a bridge builder, a beacon of light and inspiration for others to follow. — Brian, Autism Support Community

Amazon #1 UK Bestseller
Written by Callum when he was 16-years-old.
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






