Topic. Free or less than $30 US.
I can't read their online documentation. Layout is intercourse ing ugly.
http://www.amazon.com/Sams-Teach-Yourself-MySQL-Apache/dp/0672335433/ref=sr_1_5?s=books&ie=UTF8&qid=1352922622&sr=1-5&keywords=apache+web+server
http://www.amazon.com/Linux-Administration-Beginners-Network-Library/dp/0071767584/ref=sr_1_2?s=books&ie=UTF8&qid=1352842338&sr=1-2&keywords=linux+administration
I was thinking about getting these two boks, but I want other opinions.