diff --git a/src/main/java/de/ellpeck/actuallyadditions/api/booklet/IBookletChapter.java b/src/main/java/de/ellpeck/actuallyadditions/api/booklet/IBookletChapter.java
index 8c8c3cdab..d493f2f46 100644
--- a/src/main/java/de/ellpeck/actuallyadditions/api/booklet/IBookletChapter.java
+++ b/src/main/java/de/ellpeck/actuallyadditions/api/booklet/IBookletChapter.java
@@ -14,6 +14,7 @@ import net.minecraft.world.item.ItemStack;
 import net.neoforged.api.distmarker.Dist;
 import net.neoforged.api.distmarker.OnlyIn;
 
+//TODO: We're using Patchouli API for the new booklets. Do we still need this?
 public interface IBookletChapter {
 
     IBookletPage[] getAllPages();
diff --git a/src/main/java/de/ellpeck/actuallyadditions/api/booklet/IBookletEntry.java b/src/main/java/de/ellpeck/actuallyadditions/api/booklet/IBookletEntry.java
index aacfc8bbb..5dcbe3f03 100644
--- a/src/main/java/de/ellpeck/actuallyadditions/api/booklet/IBookletEntry.java
+++ b/src/main/java/de/ellpeck/actuallyadditions/api/booklet/IBookletEntry.java
@@ -15,6 +15,7 @@ import net.neoforged.api.distmarker.OnlyIn;
 
 import java.util.List;
 
+//TODO: We're using Patchouli API for the new booklets. Do we still need this?
 public interface IBookletEntry {
 
     List<IBookletChapter> getAllChapters();
diff --git a/src/main/java/de/ellpeck/actuallyadditions/api/booklet/IBookletPage.java b/src/main/java/de/ellpeck/actuallyadditions/api/booklet/IBookletPage.java
index 5af30f3f8..011f768fa 100644
--- a/src/main/java/de/ellpeck/actuallyadditions/api/booklet/IBookletPage.java
+++ b/src/main/java/de/ellpeck/actuallyadditions/api/booklet/IBookletPage.java
@@ -19,6 +19,7 @@ import net.neoforged.neoforge.fluids.FluidStack;
 
 import java.util.List;
 
+//TODO: We're using Patchouli API for the new booklets. Do we still need this?
 public interface IBookletPage {
 
     void getItemStacksForPage(List<ItemStack> list);
diff --git a/src/main/java/de/ellpeck/actuallyadditions/api/booklet/internal/GuiBookletBase.java b/src/main/java/de/ellpeck/actuallyadditions/api/booklet/internal/GuiBookletBase.java
index fb90777e5..10e2df97c 100644
--- a/src/main/java/de/ellpeck/actuallyadditions/api/booklet/internal/GuiBookletBase.java
+++ b/src/main/java/de/ellpeck/actuallyadditions/api/booklet/internal/GuiBookletBase.java
@@ -17,6 +17,7 @@ import net.minecraft.world.item.ItemStack;
 
 import java.util.List;
 
+//TODO: We're using Patchouli API for the new booklets. Do we still need this?
 public abstract class GuiBookletBase extends Screen {
 
     protected GuiBookletBase(Component titleIn) {