As the daughter of a white Welsh-speaking mother and black father from Guyana, Charlotte Williams's childhood world was one of mixed messages dominated by the feeling that 'somehow to be half-Welsh and half Afro-Caribbean was to be half of something but never quite anything whole at all. 'Sugar and Slate' tells the fascinating story of her journey of self-discovery, from the small north Wales town of her birth to Africa, the Caribbean and back to Wales.