I have written several books on the subject.
Fiberguide, is my first book in English, and in a simple way tels you a lot about fiber optics. it is not a technical book, but more an introduction to fiber optics. lots of pictures.
the othe fiber books have only been published in Danish, so click on the Dainish flag, to se a bit about them.
the next book will be on measuering
You can download the book in PDF format, look at the technical section, and download the chapters, You also have the posability of printing them out