What you need for this book
PDI is a multiplatform tool. This means no matter what your operating system is, you will be able to work with the tool. The only prerequisite is to have JVM 1.5 or a higher version installed. It is also useful to have Excel or Calc along with a nice text editor.
Having an Internet connection while reading is extremely useful as well. Several links are provided throughout the book that complement what is explained. Besides, there is the PDI forum where you may search or post doubts if you are stuck with something.