Complex sentence: In the second world war he served in the SAS as regimental padre and was among the first allied forces to be parachuted into France; his memories of this were published in the book "The Originals".
Split into simpler sentences: In the second world war he served in the SAS as regimental padre and was among the first allied forces to be parachuted into France. His memories of this were published in the book "The Originals".