It always goes like this, "Teach yourself X in 24 Hours" -> "The Definitive Guide to X" -> "Advanced Topics in X" -> "The Art of Computer Programming" -> "How to Overcome Fears, Build Self-Esteem and Succeed in Life"

周而复始的过程,悲催的程序猿：X 语言入门 -> X 语言实践应用 -> X 语言高阶编程 -> 编程之美 -> 编程之道 -> 腰间盘突出康复指南