Chris Fidao aka @fideloper just announced a new servers for hackers ebook that is scheduled to be released in September:
Application development is getting more complex, and we developers need to know how to setup and maintain the servers that run our applications. Don’t get stuck at 3am with a broken server, or in the middle of your workday fighting configuration. Learn how to administer your servers!
This coming Friday you will get to find out why Chris started Servers for Hackers in the Artisan Files series. Stay tuned!