Complex sentence: In 1969, he was contracted by the Grumman Aircraft Engineering Corporation, to write a chapter about the Moon for a press book to educate members of the media and government officials concerning the Apollo Lunar Module.
Split into simpler sentences: In 1969, he was contracted by the Grumman Aircraft Engineering Corporation to write a chapter about the Moon for a press book. The Grumman publication was intended to educate members of the media and government officials concerning the Apollo Lunar Module.