Can you pinpoint the exact moment that your struggle with mental health started? Keith Naylor attempts to do so in his book Monkey Mind, but he's not the only one on this trek back in time. He's also got Tonky - the Tonkin snub-nosed monkey that chatters away in his brain - to help him uncover the causes for his depression, anxiety and post-traumatic stress disorder. Retracing Keith and Tonky's steps might help you understand your own journey with mental health, too.