Luke Kelly, the author’s grandson: “With publishing shifting a lot, there is still, I think, a huge desire to bring his kind of vivid and mischievous world into other medium. We are really transferring from being a literary estate to being more of a story company, and that is a bit of a scary thing for some people. …[But] it just means that we’re also thinking, How do we get these amazing words and stories into kids’ bedrooms, and into their minds and imaginations, in many ways?”