The Rubik's Professor's Cube is the 5x5x5 version of the famous 3x3x3 Cube.
So it's not for the faint-hearted and is the most complex of all the Rubik's Cubes. However, knowledge of how to solve the 3x3x3 Cube and the 4x4x4 Cube will help you a lot. Be sure the rows are correctly aligned before turning the Cube and never use excessive force. There are other ways to crack this puzzle!