How to choose a tripod and a tripod, put the book flat on the table and shoot it from directly above?

Go and buy a universal shaft for use with a tripod, and it will be easy. Of course, there are also many tripods with universal shafts. Generally speaking, the quality of this tripod is a little better than that of the same brand.

If there is a universal shaft, the pan/tilt only needs to support the camera. Of course, the best choice for remake books is to use a remake stand (more expensive than a common tripod and cheaper than a good stand). Of course, a flash or a soft light to fill the light is indispensable anyway.

What is the cosmic axis? See attached drawings.