Transatlantic by Colum McCann Random House, $27.00, 304 pages, ISBN 978-1-4000-6959-0by Colum McCann Have you ever wondered about the word Genius?  What is it exactly?  Who determines it?  Where can we find it, where does it come from and how will we know when we see it?  These are just a few of the thoughts that come to mind when one thinks about the word and what it implies,