The articles in this special issue, 'Any Signs of Childness?', were adapted from papers given at a symposium of the same name, held at the University of York (UK) on May 5th, 2017, 20 years after the publication of Peter Hollindale's Signs of Childness in Children's Books (1997). The idea for the symposium came from my then-recent appointment to that university, which had prompted several senior colleagues in the field of children's literature to ask me, "Have you seen Peter Hollindale yet? Does he ever come on campus?" Peter Hollindale, who worked at York for many years, had retired long before I arrived, but when I mentioned his name to my new colleagues, some of them remembered him fondly and informed me he was still living in the city. It was some time before I found a reliable email address with which to contact him, and by then I had a cunning plan to tempt him out of retirement and onto campus for one special day. It was the 20th year anniversary of the publication of Signs of Childness in Children's Books: a sign in itself that some celebration was needed. The tutelary figure of Peter Hollindale felt like an invisible blessing, as I had always admired and used his work; conveniently, Signs of Childness in particular. Hollindale is better known, or at least more often cited (over twice as often, says Google Scholar), for Ideology and the Children's Book (1988), a highly quotable text which still provides a methodological and theoretical framework for investigations of ideology in children's literature. But his coinage and discussion of "childness" and the "childly" features of children's literature are more theoretically compelling,