In 2011, I wrote a couple eBooks for my fellow sysadmins. They are likely not very relevant today, but I'm keeping them available (free) for those who may be interested:

How to get a job at an Awesome Company

A free eBook for people wanting to work in a sysadmin/SRE/DevOps role at an awesome company such as GitHub or 37signals

After 13 years, I'm finally releasing version 2 of this eBook, for free. This updated version is not specific to one company. It aims to be generic and focuses more on standard practices and technology concepts.

How to get a job at GitHub

A free eBook for people wanting to work at GitHub

I woke up one day with an email from my friend Thierry. He sent me a link to a job ad for a Sysadmin at GitHub. It was perfect for me, but I knew competition would be tough (everyone wanted to work at GH).
To differentiate myself, I wrote and published this free eBook after spending the day reading everything about their infrastructure and trying to learn all I could about the famous company.
My plan worked, I was soon interviewed by TPW, and flown to SF for an in-person interview with the team. I joined the Ops team in August 2011.

Web Scaling vol. 1 - Small Architectures

A free eBook on how to scale a web site

I had a dream of writing my own eBooks, publishing them and getting paid handsomely for doing nothing at all. As it turns out, it's not that easy.
I wrote the eBook to provide advice to developers and small business owners on how to scale their 1-server setup to something a bit more tolerant. I had plans to write volume 2 and 3 for larger setups, but never got around to it.
The initial eBook was sold for $30 USD and it sold quite well for the first two years, but in 2014 the numbers started to drop near 1 sale per month. That's when I decided to offer the eBook completely FREE for anyone to download.
I wrote this eBook using Confluence and wish I had used a more "open" system, since now it's almost impossible for me to make revisions.