Some of the Admiralty leisure folios are worth getting. They cover a broad section of coast and contain all the adjacent charts in one booklet, usually in a plastic sheath. Better value.
For Ireland, you really need the Irish Cruising Club pilot books. There are two - one for the north and west and one for the east and south. http://www.irishcruisingclub.com/ They contain detailed chartlets of the harbours and their piloting instructions are very good. Many of the harbours, especially in the west are unmarked.
Other than that, we use the electronic charts to get from one place to another and keep one small scale chart of the west coast, south coast, and east coast onboard. Mike Balmforth 's cruising guide is a comprehensive companion to those books, covers the entire coast, and well worth having onboard as well.
Please let us know when you 're coming this way. I am the new PO for Ireland. :)
Vice Commodore, OCC