The rotation of the Sun is a basic parameter which constrains the boundary conditions for the model of the MHD-dynamo mechanisms that generates solar activity. The Sun is a slowly rotating star with a convection zone below the surface which is the site of the solar dynamo. The solar rotation depends on the latitude, depth/height and time, i.e., the Sun rotates differentially. In the book several aspects of the solar rotation are covered. Only in the case of the Sun we can directly observe details in its atmosphere and so measure the rotation velocity using various tracers, which is one of...