Hi, AdonFox! Funny timing--I've been doing a big (re)categorization of our book articles recently to get things where they belong and be consistent, and compiled a spreadsheet to keep track of which age ranges the Disney Books site puts things in. On Disney Books, they have "6–8 Years Old," and "8–12" or "9–12 Years Old" (they're inconsistent about starting it at 8 or 9), for the non-YA/Adult novels and chapter books. I've been looking at it like so; hope this is useful and not too long-winded!
Wow this is amazing helpful. Thank you so much for the work that you have done here. I think the way that you have set it out and explained it here makes complete sense and following this criteria would provide the timeline with some much needed consistency. I can spend some time going through the entire timeline and checking that the all JR and YR book categories fit this outline.
Sorry if I am making a mountain out of a mole hill here but I know that many people, like me, who frequent the timeline are a little 'completionist' about the canon, not necessarily for the YR novels which aren't the most readable for adults, but still enjoy much of the junior stuff. Also if you need any help at all with the spreadsheet or even anything else I will be happy to do what I can. AdonFox () 22:04, 18 March 2021 (UTC)