Brian was joined by authors Steve Butler, Sibeal Pounder, Jonathan Meres and Shane Hegarty for the launch of World Book Day in Liberty Hall, Dublin.
Hundreds of children converged on the theatre in Liberty Hall for photographs, book signings, readings and talks by the authors.
Steve gave a hilarious account of his own childhood, Sibeal dressed volunteers from the audience as witches, Shane spoke about his Darkmouth series of books, Jonathan played the guitar, and Brian read the opening scene from his World Book Day novel, One Good Turn.
Afterwards all of the authors met the children, and the event was filmed by RTE and shown on News2Today.