Joe O'Brien lives in Ballyfermot in Dublin with his wife and children. He is the author of nine books featuring Alfie Green, a boy who can talk to plants. For older readers he has written three books about Danny Wilde and his Littlestown Crokes GAA team, Legends' Lair (about Charlie Stubbs and his dreams of becoming a soccer player) and one fantasy novel, Beyond the Cherry Tree. He has appeared on RTE's The Den, TV3's Ireland AM and many radio shows. He regularly holds readings in bookshops and libraries around the country.