Screenshot from Destructoid
PEAK The Roots update introduces some of the most useful items we've ever seen in the game. From flags that give you spawn checkpoints to the mysterious Book of Bones that has transformative powers, getting to the top of the mountain has never been easier.
How to find the Book of Bones in PEAK
The Book of Bones is a mythical item that can appear inside. Ancient luggage bags and in any Ancient statue at the top of the level. Every time you open this luggage bag or interact with the statue, there is a chance that you will find the Book of Bones as a reward.

The only drawback is that PEAK has several mythical items that you can get through these two methods. There's a chance you'll find Anti-Rope, Panacea, and other resources instead. If you are looking for a Book of Bones for Applied icon “Esoterics”eyou may have to reset the expedition several times until you find it.
You'll know you've found the Book of Bones when you see a purple book with purple swirling particles coming out of it. These particles will still appear even if the book is in your backpack, so you won't be able to hide it from your friends.
What does the Book of Bones do in PEAK?
The Book of Bones has two main purposes, depending on whether you're in a single-player or multiplayer lobby:
- In single player, you can pick up and read the Book of Bones to turn into a skeleton.
- In multiplayer mode, you can either read the Book of Bones yourself or use it on a dead teammate to turn them into a skeleton. For this you will receive the “Applied Esoterics” badge.

Becoming a Skeleton gives you immunity to almost all types of damage through a powerful curse effect that takes up about a fifth of your stamina bar. You will also become much more vulnerable to fall damage, zombie attacks, and dynamite explosions.
While you'll still be able to survive zombie bites without too much trouble, fall damage can now kill you very easily even from short distances. Using items like balloons and an umbrella can help reduce the damage you take, but you'll still have to be careful just in case. You can also plant Checkpoint Flag if you are going to take some risk and think there is a chance that you will fall to your death.







Published: November 6, 2025, 4:05 pm