A book is available that gives a very clear introduction to Relativity.
This book is available at all major bookstores, Amazon.com, or the below
website, and is called "An Introduction to Relativity Physics", by R. L.
Gerl (ISBN: 1-58619-025-3). Any interested person can order the book at
their local bookstore and, if they decide it's not for them, the bookstore
will simply put it back on their shelf. This book is great for
self-education or as a supplement to formal training.
Randy
http://www.rlgerl.com