Is there a book only about Ansible (without touching Vagrant, VirtualBox, Docker and virtualization stuff)? I need a book only about Ansible (without touching Vagrant, VirtualBox, Docker and other above-shell stuff).

About 6 months ago I tried reading the Ansible docs but these were totally un-understandable to me so I bought a good book by Jeff Geerling named "Ansible for DevOps" which is aimed of course for DevOps and thus includes extensive elaboration on software like Vagrant (OS-level virtualization-management tool), VirtualBox (OS-virtualization tool that is managed with Vagrant) and if I'm not wrong Jeff also touches Docker there, but this is not what I seek and had hard time understanding much because I had no DevOps background at the time besides some Bash.

I usually work with IaaS hosting services in which I can't even utilize Vagrant and VirtualBox and have no usage in Docker (I do well with Bash and some Bash extensions like Composer, Drush for Drupal and so forth which make Docker redundant for the projects I personally work on).

Is there a book that teaches Ansible but focuses only on Ansible, say, something that does general introduction to YAML, then to creating and playing Ansible playbooks on Linux environments (native/WSL)? Some kind of "Ansible for web developers" or "Ansible for general audience"?
I would highly recommend looking at this tutorial by digital ocean. How to install and configure Ansible on Ubuntu. 

Although this tutorial is not a book, I had a similar situation with the ansible docs and trying to understand them when I first got started. This tutorial will provide an in depth hands on experience for getting started with ansible.