Indiana Jones and the Great Circle: The Order of Giants Guide | Adventure Book Collectible
Here’s how you can find the two adventure books in the DLC.
Game Guide by Joyramen on Oct 05, 2025
There are two adventure books that you can collect in Indiana Jones and the Great Circle: The Order of Giants DLC, the Hard Crust and Vitamins books, both of which contribute to completing the DLC’s mysteries and achievements, so you’ll need to find both to complete the collection.
Hard Crust Adventure Book

You’ll be able to find the Hard Crust Adventure Book during the early part of the DLC in the casina area on the top floor of the building.
Inside it, there will be a debate room, which will act as the starting point for the mystery. On one of the deaths in the corner, there’s a note that will initiate the mystery. You’ll be able to find another note beneath one of the booths in the same room on the left side.

Once you collect both of the notes, it becomes easy to unlock the safe in the corner of the room. The code to open the safe is 1222. When you open the safe, it will contain one of the two books. Completing it not only grants the book but also gives you insight into the hidden lore of the casino's upper floor.
Vitamins Adventure Book

You'll find the second and final book, the Vitamins Adventure Book, in one of the key exploration areas named Via Giulia, later on in the DLC.

Once on the main street, you must follow the path into a narrow alleyway and then climb the scaffolding all the way to the top, where you will find a zipline.
However, instead of using the zipline, you have to look for a balcony nearby that you can reach with a short jump.

Then enter the apartments with the balcony to find the Vitamins Book. Once you’re done, you that complete the DLC’s book set. In the room, you’ll also find a cat to pet, which will help you complete the cat petting achievement.
Also, check out our Indiana Jones and the Great Circle Review and other guides below:
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