the book, "my 30 work days", was written by andy lau extracted from diaries and notes that he wrote while shooting the "a simple life". the book contains lau's 30 personal diaries and notes detailing his observations and thoughts about issues raised by the story of the film, in particular appreciation of and care for the elderly, along with 300 behind the scene photographs taken by lau and his colleagues. the book was published on 27 february 2017 by ming pao publications in hong kong.