![In Knives Out (2019) all the letters to Linda from her father are written in invisible ink revealed by heat. All her previous letters have a burn mark where she used a In Knives Out (2019) all the letters to Linda from her father are written in invisible ink revealed by heat. All her previous letters have a burn mark where she used a](https://preview.redd.it/rcm280llbdo41.jpg?auto=webp&s=ac280be5e5c4cdf1e1666dae96d3da35af8baee6)
In Knives Out (2019) all the letters to Linda from her father are written in invisible ink revealed by heat. All her previous letters have a burn mark where she used a
![The Social Media Frenzy Surrounding 'Knives Out 2' and What to Expect From the Sequel - Hollywood Insider The Social Media Frenzy Surrounding 'Knives Out 2' and What to Expect From the Sequel - Hollywood Insider](https://www.hollywoodinsider.com/wp-content/uploads/2021/05/Hollywood-Insider-Knives-Out-2-News-Social-Media.png)
The Social Media Frenzy Surrounding 'Knives Out 2' and What to Expect From the Sequel - Hollywood Insider
![In Knives Out (2019) we see a letter that appears to be blank, but later is revealed to have invisible ink. For a few frames, you can see the light passing through In Knives Out (2019) we see a letter that appears to be blank, but later is revealed to have invisible ink. For a few frames, you can see the light passing through](https://preview.redd.it/9iad5p2mt7s41.png?auto=webp&s=f9e613064d58653a367d06afa5b9822211523486)
In Knives Out (2019) we see a letter that appears to be blank, but later is revealed to have invisible ink. For a few frames, you can see the light passing through
![In Knives Out (2019) you can see burn marks on a letter Linda is reading half way through the movie. Explanation in comments : r/MovieDetails In Knives Out (2019) you can see burn marks on a letter Linda is reading half way through the movie. Explanation in comments : r/MovieDetails](https://preview.redd.it/cbuzrlqsepw71.jpg?auto=webp&s=0654b53df886cd0c3603aa65c17c6de08f379375)