Complex sentence: The Book Prize program was founded by the late Art Seidenbaum, a "Los Angeles Times" book editor from 1978 to 1985; an award named after him was added a year after his death in 1990.
Split into simpler sentences: The Book Prize program was founded by the late Art Seidenbaum, a "Los Angeles Times" book editor from 1978 to 1985. An award named for him was added a year after his death in 1990.