About Grace O'Malley

A history of Grace O'Malley can be found at The Clan O'Malley official website

Read an interview regarding Grace O'Malley with Caroline Rowan, Researcher, University College Dublin

A summary of Grace's life can be found at The Discovery Channel web site


About the locations used in the book

The Cave of Wonders is based on a real place in Northern Ireland called the Marble Arch Caves. The BBC web site gives a virtual tour

The Museums of Mayo website gives an overview of Ballintubber Abbey

The Mayo Ireland Ltd website for Westport, Ireland

A lovely view of the sunset on Clew Bay

More information on Rockfleet Castle

The official website for Westport House


About the book cover

The cover painting was created by Jen Dubis


About time travel

A wonderful article on time travel with Carl Sagan

Some additional insights by the BBC