Past me is often a complete idiot. Present me is always a genius, obviously.
Chapter 1: The beginning of everything.
The glue in-between those and all the other parts.
Sounds like you have a book shortage problem.
Amazon US: www.amazon.com/dp/B0DHH7D7DMwww.amazon.ca/dp/B0DHH7D7DMwww.amazon.com.au/dp/B0DHH7D7DM
Stealth of a Nation - Kindle edition by Le Dow, Simon. Download it once and read it on your Kindle device, PC, phones or tablets. Use features like bookmarks, note taking and highlighting while reading Stealth of a Nation.
The determiner is where did they put The Hobbit, Lord of The Rings and the Silmarillion? That tells you everything you need to know about how they categorise. (I would personally suggest "children", "young adults", and "supreme fan-geeks" respectively).