You’ve probably noticed that each book in the UK editions of the Artemis Fowl series, as well as some other editions, has a strange little design at the bottom. But did you know that that design is actually a code?

And as with all codes, it can be de-coded, to discover the message written in it. On each of the pages below, you will find a picture which tells you the code, if you want to de-code the message for yourself, and further down, you can find the message fully de-coded, for anyone who would rather just see what it says.

Artemis Fowl - Both the Uk and US editions of the book had this code, written in Gnommish.

The Arctic Incident - This code, written in Centaurean only appeared on the UK versions.

The Eternity Code - The code here has been labelled “The Eternity Code,” and appeared on UK versions only, but anyone can read it here!

The Opal Deception - The code returned to the Gnommish language here, and was also present in the US editions.

The Lost Colony - Gnommish continues to be the main language in the Fowl world with this code. Demon survival tips abound!

The Artemis Fowl Files - The code here is Gnommish, and was a puzzle in the Artemis Fowl Files.