"I've written 16 children's books and five unpublished novels. Some of the latter were breathtakingly bad"

Mark Haddon's quote is a reflection on his composing career. He is acknowledging that he has written 16 kids's books, which have actually been published, and 5 unpublished novels. He is being sincere and humble in confessing that some of the unpublished books were not of a high quality. This quote reveals that he is not afraid to be open and sincere about his work, even if it is not his finest. It likewise shows that he is not afraid to take risks and attempt brand-new things, even if they do not constantly turn out as prepared. He is not scared to put himself out there and try new things, even if they do not constantly turn out as anticipated. This quote is a testament to his resilience and decision to keep writing and creating, even if some of his work is not as successful as he would like.