The Funny Pages

Introduction
For night six, everyone was mailed a copy of the Funny Pages - a collection of comics from some of Cards Against Humanity's favourite comic strip artists.

Ransom Note
It was discovered that the randomly cut out letters from the Ransom Note that Dad discovered on entering the second room matches letters and phrases from the Funny Pages.

It was discovered that the letters that were left behind if you had cut out the letters yourself spelt

PAGE ONE FIVE FOUR AT DIESEL

leading to this hidden comic on the Diesel Sweeties website.