Let's suppose for instance you are a complete idiot eager to learn Java2 and not very sure about the career path to follow. According to Amazon, you should became a game programmer (look at the recommended “listmania”).
Now, say you are somewhat smarter and you're willing to try some recipes from the Refactoring Workbook. Well funny thing it seems that you need to move to .Net (look at the “So You'd Like To…” section). I surely can understand that, especially if your current project is VB, you should really be into refactoring and moving to .Net.