Currently, Chapters 1 through 6 of the source eBook, SweaterWise: Knitting A Sweater That Finally Fits You, are available. The first worksheet is also available, and will be emailed to purchasers of the handbook.
The cost for the entire series of chapters, and the pattern, is $13 USD. You only pay the fee once, and updates are added to your Rav library as they are released. Be sure to check the email account linked to your Rav account for update info.