What are some key similarities and differences between C.S Lewis book "A Grief Observed" and its Hollywood depiction?

What are some key similarities and differences between C.S Lewis book "A Grief Observed" and its Hollywood depiction? Original posts should be 200-250 words (please, no more than that!), and secondary posts (if used) must be limited to 200 words and should reflect engagement with what others have posted as much as possible. The film, Shadowlands, can be accessed through the following link; also posted in the Assignments Log.  The link is: https://www.youtube.com/watch?v=frSxOadjioY  Shadowlands runs for 3 hours.  Anthony Hopkins and Debra Winger star.