(Do not confuse this with the Heritage Card)
In Rick's 2015 Ireland guide he talks about the Heritage Island Touring Guide. This needs to be updated (perhaps it has but I missed it.)
1. There is not a €7. Charge. It is free at most TI's. They simply give you a folder of all of the sites it covers and with tear off vouchers at the bottom of the page. It saved us 50% at the Waterford Crystal Factory (€10 for two people....and it is free!)
2. While Rick lists St. Candice Cathedral ((Kilkenny) and Number Twenty-nine Georgian House (Dublin )
They had never heard of the Heritage Island Guide and did not honor it
On another note the Heritage Card is a super deal if you will be in Ireland for almost any time (senior price€20). After using it twice it pays for itself. I have used it 4 times in my first 2 days out of Dublin.