Colm has written a book on Nanotechnology for the layperson, called "Size really does matter. -the nanotechnology revolution".  Available since March 13th 2019.  See the link below for an article on this on the website of the Engineering Department at the University of Cambridge: http://www.eng.cam.ac.uk/news/dr-colm-durkan-has-written-popular-science-book-nanotechnology