Gardiner, Egypt of the Pharaohs, pp. 166–167; in the case of the Hyksos, the Egyptians developed a bitter hatred against them that intensified as time passed, largely because the Hyksos imposed their rule and to some extent customs onto the Egyptians rather than merging into Egyptian society as did other foreigners such as the Nubians and Libyans, and even outsiders such as the Sea Peoples. See also Donald B. Redford, “The Hyksos Invasion in History and Tradition,” Orientalia 39 (1970), pp. 1–51.