Just wanted to let you know that for the past 4 courses I have completed I have purchased the book for the relevant course which was delivered in only a few days from placing the order which was great service. To have both the book and the information online has just been great and so helpful that is has made it easier to gather information required and complete the course. You get to keep the book for future reference and it comes in a nice spiral binder with front and back covers to keep it nice. Highly recommend purchasing the book to help with the course you are doing and you get to keep it for future reference. Great work.