Most people learn early that fitting in feels safer than standing out. But when you are autistic or have ADHD and do not yet know it, the performance can run your whole life. This book is for anyone who suspects they have been masking for years — or who has recently been diagnosed late and is trying to work out what that means. It explains, in plain language, what masking is, how it begins, and why it is not a weakness or a character flaw. It explores the real costs: exhaustion, anxiety, depression, burnout, lost identity, and the strange grief that can follow a late diagnosis. Crucially, it does not offer a cure or a ten-step fix. Instead it offers a slower, kinder path to noticing your own needs, testing unmasking in safe places, and building a life that asks less of you. Written by a neurodivergence writer, not a clinician, it never claims to diagnose — it helps you decide whether seeking a formal assessment is right for you. Part of The Late Diagnosis Library.