The title page has the annotation: 'comets demystified, for those of all ages'. That is true & valid. Some other apropos subtitles could have been: 'comets – from soup to nuts', 'everything & more you ever wanted to know about comets', 'a primer for the wannabe expert', or even 'the handbook NASA wishes it had'! The goal of this book is to tell you, in a relatively entertaining manner, everything you might ever want to know about comets. Nothing more, nothing less.
You should exploit the preview feature to peruse some of the pages of this book & admire the figures (and there are over 60). Check out the 'Table of Contents'. You will see that this book covers it all: 'What?, When?, Where?, Why?, Anatomy, Origins, Orbits, Discovery, Naming, Brightness, Exploration, Great Comets & even Meteor Showers'. There is a whole Appendix & multiple sidebars on essential & technical vocabulary. This book is truly comprehensive – but written, intentionally, in a relatively informal style to make it engaging & easy to follow.
The author, a professional technical writer, has written other books on comets & astronomy. His 2013 book on 'Comet ISON' was well received. One reviewer wrote, online: "The Lord's Prayer in a technical book by Anura"! Another said: 'Remarkable Author & Information Genius'.