LibreOffice VS calibre

First of all, if you need to write a lot of files in the doc format, there's a lovely office suite called libreoffice! Also, cups is a decent print utility for most printers, I'd check that out as well.

Try LibreOffice or OpenOffice .

Proof: https://github.com/LibreOffice/core/graphs/contributors

Both Apache OpenOffice and LibreOffice are descendents of the original OpenOffice (what you're probably thinking about.)

LibreOffice is under very active development and can be downloaded from https://www.libreoffice.org/

Apache OpenOffice is effectively abandonware at this point, see https://wiki.openoffice.org/wiki/Product_Release It's mostly been maintenance releases since 2013.

If you want LibreOffice with support (or just want to support development), you probably want Collabora.

If you need programs like office word excel and power point but offline try looking into Libre office

Not to be confused with Calibre, the excellent ebook software by Kovid Goyal:

https://calibre-ebook.com/

Glad you were able to fix it, but what about trying Calibre? It is free and makes it easy to adjust things, add info, and change front covers.

Or using Calibre (pdf or azw3) https://calibre-ebook.com

There are already some very good ebooks solutions out there so there's really no need. Calibre for the backend and database management, Calibre-Web for the front end, and Openbooks for content.