What is the novel´s message to the readers?

In the book, The Curious Incident of the Dog in the Night-time, Haddon says he was trying: 'to take a life that seemed horribly constrained, to write about it in the kind of book that the hero would read - a murder mystery - and hopefully show that if you viewed this life with sufficient imagination it would seem infinite.'

Haddon explains that writing about disability thows light on things that might otherwise seem ordinary: 'It isn't entirely comfortable' he explains, but it show us 'how little separates us from those we turn away from in the street. It's about how badly we communicate with one another.'