Award-winning British novelist David Mitchell and his Japanese wife Keiko Yoshida have an autistic son.
They've translated and had published a book by written by a Japanese autistic 13-year-old, Naoki Higashida.
The Reason I Jump: The Inner Voice of a Thirteen-Year-Old Boy with Autism is intended to demystify the behaviour of autistic children for a 'neurotypical' audience and was first spotted online by Keiko Yoshida.
Kathryn Ryan asks David Mitchell about the project.