The definition of time is perhaps one of the more interesting conundrums, and one which has engaged me for some time. I find it difficult to come up with a self-originated one, but might recommend two books, which even I as a non-scientist read and enjoyed.
One I have recently mentioned on the list, The Calander, by David Ewing Duncan, and the other is, A Brief History of Time, by Stephen Hawkings. They are very different kinds of book, but nonetheless address the question of "What is time?" Duncan looks at time in terms of the world and makind as a practical measure, while Hawking's is a much more scientific look at its meaning in the cosmos. Paul Murphy
