Camille, you may want to look at https://goo.gl/3GZwiC for one approach used in our domain. There are others applicable to other domains.
Here’s a broader set of resources we use in our domains as well for estimating agile projects http://goo.gl/L3KAGX
Maybe some of these might inform your book efforts.
And a table of contents for one of my books https://goo.gl/ClV2zC