I don't think they're particularly important texts culturally, but they are well-crafted.
He's probably the best essayist in English of the 2nd half of the 20th century.
Bill Buckley offered to punch Vidal out on live television on the ABC network during a national convention in 1968 or 1972 while making some colorful and graphic references (in the King's English) to Vidal's perversions.
You would not make Vidal part of the curriculum at your putatve school???? Right?