It has a perfect cube shape but basically it's a Rubik's Cube twisted 45 o around a central axis, making 4 edge pieces become centre pieces, 4 centre pieces become corner pieces and so on. If you can solve the classic 3x3x3 you can't have problems with this one, just pay attention to the parity.
The Skewb (/ ˈ s k juː b /) is a combination puzzle and a mechanical puzzle in the style of Rubik's Cube. It was invented by Tony Durham and marketed by Uwe Mèffert. Although it is cubical in shape, it differs from Rubik's construction in that its axis of rotation pass through the corners of the cube rather than the centres of the faces.