Complex sentence: Pratchett was appointed Officer of the Order of the British Empire (OBE) in 1998 and was knighted for services to literature in the 2009 New Year Honours.
Split into simpler sentences: Pratchett was appointed Officer of the Order of the British Empire (OBE) in 1998 and was knighted "for services to literature" in 2009. In addition, he was knighted in the 2009 New Year Honours.