Did you buy the V2 from us? If not, then no discount on the books. Sorry but I'm not sure who you are by your forum name. As for the books, yes they are geared towards teaching you how to tune as well as many other things (like how to read, how to flash, how to datalog, etc.) - the CD that comes with the books contains dozens of documents with additional information on them that help point out and get you through a lot of other issues when it comes to working on the different trucks.