A practical course in Irish grammar, aimed mainly at undergraduates and postgraduates in the Irish language. This new edition incorporates the principal amendments from Gramadach Gaeilge: An Caighdeán Oifigiúil (Baile Átha Cliath, 2016) to ensure that users of the book have an authoritative reference guide to professional writing in the Irish language. The book is accompanied by lessons which can be found on the site. In this new edition, particular attention was given to the developments being made with online sources and to give appropriate direction to those seeking grammatical explanations based on the updated Caighdeán Oifigiúil.