Sean Williams is a #1 New York Times-bestselling author of over forty novels and one hundred and twenty short stories for adults, young adults and children. Recent releases include the Twinmaker trilogy for YA readers (which takes his love of matter transmitters to terrible extremes) and the Astropolis space opera series (featuring a character who speaks solely in the lyrics of Gary Numan). As well as his original fiction, he has contributed to shared universes such as Star Wars and Doctor Who. Normally, he lives in South Australia with his wife and family, just up the road from a chocolate factory, but 2018 has seen him living in Dublin and loving everything about it. Have Sword, Will Travel and Let Sleeping Dragons Lie, to be launched in Ireland in October, are the first adventures in a new middle-grade series co-written with fellow Octocon guest Garth Nix.