“We all know that Linux is badass. Now there’s a book to prove it. Sure to convert even the most die-hard Windows or Mac users” I think you meant ‘OS X users

“We all know that Linux is badass. Now there’s a book to prove it. Sure to convert even the most die-hard Windows or Mac users” I think you meant ‘OS X users’ instead of ‘Mac users’. Macs are computers – they can run a number of OSes, including GNU/Linux distributions. Mac users can be GNU/Linux users. I hope this error is not indicative of the rest of the content.