Tariq Ali a British leftwing activist and journalist is not an academic specialist in Cuban studies so Im afraid that we probably wouldnt treat his book as a particularly reliable source here on Wikipedia There are far more accurate published works on the topic of Castro and his administration and it is these which we have cited in this article admittedly these have been written and published within a bourgeoisie society that  if one chooses to adopt a Marxist perspective  is likely to mean that they express a particularly antiCastro and anticommunist view However I and others have gone to great lengths to ensure that this particular article does not carry a bias thereby fitting with Wikipedias NPOV policy