Written by two Debian developers, this book is for those wanting to get a better understanding of administrating your machine. The handbook has something for all Linux Mint editions (packaging system for example). Of course also for other Debian based distros!
Download the book for free (also for e-book readers): http://debian-handbook.info/get/now/
Browse it online: http://static.debian-handbook.info/browse/stable/
Or buy it printed: http://debian-handbook.info/get/
Consider making a donation, to keep the book updated (Donations can be done from the download page.)