A Storm of Blossoms is a story with three basic elements to it. The first is the main books, which are written from Kyoko’s perspective and are presenting the core narrative of the story. If you want, you can read just those books, and the story will make sense. There are also interludes placed between the books, though, which expand upon the story, setting, and characters, providing other perspectives and context. Most are written in a similar first-person perspective through another character’s eyes; others are more experimental, and might feature multiple characters, or represent an in-universe document.
These are listed in the Table of Contents, alongside the chapter headings of the primary narrative. For people who would rather read the story as a downloaded file, the Books tab has PDF and ODF formats of each book, as well as of each interlude. There are additional notes written as comments on many chapters, providing context, pronunciation, and other information about the story. Each book file has an associated notes page listed with it. Meanwhile, the Notes page on this site is where I put longer, more detailed discussion of various things, out of universe. Some of the context I use is too elaborate to put in the chapter notes (and once you start reading you’ll see that’s saying something), so I list it here. Each note on that page is marked with a chapter number; this is essentially the point in the story where the note is placed, that is, anything earlier than this might have spoilers on there. On the site, each chapter associated with one of these notes will say this in the comments.
Books, interludes, and author’s notes are the three different elements of A Storm of Blossoms. You can read just the main books if you want, or the books and interludes; my notes are not required, just there if you’re curious about some piece of context.
All of these elements are released under a Creative Commons BY-SA license, the terms of which can be found here. The summary is that you are free to use the material, including for commercial purposes and derivative works, provided that you attribute the work (preferably by providing a link to this site), and with the caveat that you must release your work under the same license.