(You only have to go through the highlighted part - that's my stragedy of learning through this wikibook. I've not highlighted anything in this intro 3, because there is nothing to it in intro 3.)
About this bookThis book is written as a tutorial, in the sense that all key concepts are explained. As such, it also contains exercises that are clearly marked as such at the end of a page or chapter. Answers for these exercises are also included.
The book can also be used as a reference. For this purpose, all keywords are mentioned and described.