I've been making crooked and hook knives for a long time using them to make selfbows, walking sticks, canoe paddles, spoons, bowls, camp furniture and the like. I've posted a video on YouTube explaining the design dynamics of these two types of knives, things that a lot of people may not be aware of. Over the next few weeks I'll post more videos showing how to use these tools in specific bushcraft situations. The video also shows some "hybrid" designs incorporating the design elements of both the true crooked knife and the hook knife.
http://www.youtube.com/watch?v=-0qpVW5r15M
http://www.youtube.com/watch?v=-0qpVW5r15M