Does anyone know what the Substore book classification means?   My tour guide didn't know for sure but thought it might originate with Amazon.

Hmmmm.....I guess nobody else knows either!  I was just curious and suppose I will just stay that way.  Everyone have a great weekend!

I even googled it a couple different ways to see if I coul figure it out. I've seen that myself and wondered.

My best guess is that "substores" is a generic term for "sub-genres". Although, why it shows up sometimes in the genres as an actual word, I couldn't say.

I think I figured it out.

One place you see "Substores" is when you are looking at the genre of books on a bookshelf.

For example, a book will say "Literature & Fiction, SubStores"

When you click on the book to go to the book description, it is listed in multiple sub-genres under Literature and Fiction.

So, I think "Substores" is just what is says in certain places, as shorthand for "This book is listed in multiple sub-genres under this main genre"