Half-castes of Malaya and other European colonies in Asia have been part of non-fiction and fictional works. Brigitte Glaser notes that the half-caste characters in literary works of the 18th through 20th century were predominantly structured with prejudice, as degenerate, low, inferior, deviant or barbaric. Ashcroft in his review considers the literary work structure as consistent with morals and values of colonial era where the European colonial powers considered people from different ethnic groups as unequal by birth in their abilities, character and potential, where laws were enacted that made sexual relations and marriage between ethnic groups as illegal.