Dear IAmNobody,
ArchLinux - in this case ArchLinux ARM (ALARM) - is a bare-bones operating system that provides a linux kernel (to support your hardware) and a package manager (think AppStore; a systematic way of installing software).
Armbian is a different operating system that comes with a different package manager. As such, the package/software format of ALARM is not compatible with that of Armbian, and you won't be able to directly install software prepared for ALARM. However, Armbian is based on Debian which is an operating system with a vast selection of
compatible packages; calibre, for example, is available
here (make sure to download the package matching the architecture of your kernel, arm64 or armhf.)
Please note that we won't be able to assist you with the installation of Debian packages. For that, please consult with the Armbian community.