Hello Luis,
The eBook is only $56 USD and you can buy from amazon.co.uk
You can also ask your affiliation to buy the eBook or the Hardback and you can take turns in reading it. It could be a very worthwhile investment for many. To read about the book, you may go to:
I think Amazon UK has a similar site with similar information. I hope this is not too much marketing. I can’t get around without giving the forum such information. The end benefit is that people will learn how waveguides can be useful for LED lighting and machine vision. I am hoping these would end up being really exciting fields for optical waveguide experts and OptiBPM users.