Complex sentence: On 6 October 2008, their autobiography, "Chas & Dave-All About Us", written by Chas, was published in the UK which took him a quarter of a century to write.
Split into simpler sentences: On 6 October 2008, their autobiography, "Chas & Dave-All About Us", written by Chas, was published in the UK. It is reported that it took him a quarter of a century to write.