Possibly the swiftest route to your roots.
Irish genealogy website directory.
www.cruithni.org.uk/
Description:
There are hundreds of books, and thousands of publications on the history of Ulster. I hope that the following notes and references will provide an interesting introduction to the subject. The material is not intended to provide a rigorous historical analysis. Instead, it provides an introduction to a selection of historical events, together with suggestions for further reading.