These little guys are available directly from Annie Modesitt.
They're affordable at $4.99 each or the set of four flip books (which are really almost 8 of them) for $15.
It's a great idea. Well-photographed, clear flip books that show knitting techniques. It's like having a video that you can slow down and look at frame-by-frame, but the video never freezes up, stops working, changes location online or gets all blurry.
Photos are clear and a little larger than life-size.
The books are small enough to go in your knitting bag, which is great, because I always start out strong with a new technique at home and then get all flummoxed when I can't remember what to do at knitting group.
The techniques covered are invaluable and I think it's unlikely that a knitter wouldn't want at least one of them. Annie's "Grandma" increases, combination and western knits and purls and decreases are included.
Each flip book is really more like two books, because one technique is shown in one direction and the other technique is shown in the other.
Pages are black and white on one side and in color on the other. This is nice, because it keeps everything clear and, I think, probably helps the flipping experience.
Maybe if we all get one, Annie will want to make more of them. (Please?)