I recently purchased this book, "Fiber Optic Reference Guide" by Goff and "Understanding Fiber Optics" by Hecht. I knew nothing about fiber optics and had to get up to speed in a very tight time frame. This was my second favorite of the three, as it did a very good job of providing a basic explanation of the technology behind and implementation of fiber optics. This book was not bad in any way, there were merely some areas where Goff's book (which was the most useful of the three) were more up to date and the illustrations were more clear. Also, it did seem as if a few items within the book were a little dated.