ZIM or Book?

While testing kiwix-android, I realized that content are called _books_ there. In French, it is translated as _livres_.


I briefly checked other readers and AFAICT, most of them avoid naming what a _Content_ is. The only one I found is on the top of Kiwix-serve:

We've agreed long ago (Stockholm 2019) on our core concepts:

- Library (we didn't distinguish Local and Remote at that time)
- Title: _Content_, over time
- Book: Materialization of a _Title_: a ZIM file.
- Category & Tags for classification.

I don't recall if those were supposed to be internal naming or if those were meant to be exposed as such to our users. Now that it's real, I find “book” very limiting, especially as it welcomes users into the app. Ain't there a risk of misinterpretation?

Anyway, I don't want to undo what's been done ; so here's the question: should we start using the _Book_ naming more (and everywhere) or should we be pushing the _ZIM_ name? Both seems to compete and I was under there impression that we wanted to strengthen the ZIM _brand_, especially given there are a lot of actors using ZIMs.