The writer was 79 when he passed away yesterday.
Salem's writings include 15 books and 25 plays. His most famous work was "School of the Troublemakers," a 1971 comedic play about a class of riotous teenagers reformed by a female teacher.
Salem courted controversy by visiting Israel in 1994, travelling by himself without even telling his wife or three daughters. He drove a car across the border after Israel and the Palestinians signed the 1993 Oslo peace agreements.
Salem's book "A Drive to Israel" sold more than 60,000 copies, a best-seller by Egyptian standards. But he was shunned in Egypt for the visit and fellow writers labelled him a sellout or collaborator.
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Salem's calls for peace and normalisation with Israel eventually caused him to be expelled from the Writers Syndicate, a move that was overturned by an Egyptian court. Immediately after the court ruling, he resigned from the syndicate, saying he only went to court to prove a point.
In later years Salem spoke in support of the protest movements against former President Hosni Mubarak years before the 2011 uprising that ended Mubarak's 29-year rule.