The picture makes it look like it is a set of 6 books of about 200 pages each (at least) but the actual product on the kindle is about 150-ish. Is this ever going to be a set of full books and if it is, anyone knows when it will be here? I'd love to have this in my collection!
These are just prequels, they're not things to be but rather are to give you an insight into the characters and their pasts. They're not required for the series but just give you a bit of extra knowledge.