Escape Mail Games Night!

About Family Secrets Series, from BoardGameGeek:

The Family Secrets Series is an escape room in an envelope. The series consists of 12 episodes which all follow the the story of your long lost cousin, JJ Fitzpatrick in your combined search for lost family treasure. Episode 1 is an envelope addressed to you from your cousin JJ with some mysterious contents, and a letter stating that you and your family are entitled to a wealth of treasure, if you're smart enough to find it. What you don't know yet is just where this adventure will take you! Do you have what it takes to solve the mystery and claim your family's treasure? The game can be completed in single standalone episodes or the entire 12 episode campaign arc can be purchased. -description from the publisher