diff --git a/nms-patches/PlayerConnection.patch b/nms-patches/PlayerConnection.patch
index 627b84a41e..dcfc048029 100644
--- a/nms-patches/PlayerConnection.patch
+++ b/nms-patches/PlayerConnection.patch
@@ -1597,16 +1597,93 @@
          ArrayList arraylist = Lists.newArrayList();
          Iterator iterator = this.minecraftServer.tabCompleteCommand(this.player, packetplayintabcomplete.a(), packetplayintabcomplete.b(), packetplayintabcomplete.c()).iterator();
  
-@@ -1334,12 +2409,34 @@
-                             PlayerConnection.LOGGER.error("Couldn\'t pick item", exception7);
-                         }
+@@ -1040,10 +2115,13 @@
+                 }
+ 
+                 if (itemstack.getItem() == Items.WRITABLE_BOOK && itemstack.getItem() == itemstack1.getItem()) {
++                    itemstack1 = new ItemStack(Items.WRITABLE_BOOK); // CraftBukkit
+                     itemstack1.a("pages", (NBTBase) itemstack.getTag().getList("pages", 8));
++                    CraftEventFactory.handleEditBookEvent(player, itemstack1); // CraftBukkit
+                 }
+             } catch (Exception exception) {
+                 PlayerConnection.LOGGER.error("Couldn\'t handle book info", exception);
++                this.disconnect("Invalid book data!"); // CraftBukkit
+             }
+         } else {
+             String s1;
+@@ -1067,6 +2145,7 @@
                      }
+ 
+                     if (itemstack.getItem() == Items.WRITABLE_BOOK && itemstack1.getItem() == Items.WRITABLE_BOOK) {
++                        itemstack1 = new ItemStack(Items.WRITABLE_BOOK); // CraftBukkit
+                         itemstack1.a("author", (NBTBase) (new NBTTagString(this.player.getName())));
+                         itemstack1.a("title", (NBTBase) (new NBTTagString(itemstack.getTag().getString("title"))));
+                         NBTTagList nbttaglist = itemstack.getTag().getList("pages", 8);
+@@ -1081,9 +2160,11 @@
+ 
+                         itemstack1.a("pages", (NBTBase) nbttaglist);
+                         itemstack1.setItem(Items.WRITTEN_BOOK);
++                        CraftEventFactory.handleEditBookEvent(player, itemstack1); // CraftBukkit
+                     }
+                 } catch (Exception exception1) {
+                     PlayerConnection.LOGGER.error("Couldn\'t sign book", exception1);
++                    this.disconnect("Invalid book data!"); // CraftBukkit
+                 }
+             } else if ("MC|TrSel".equals(s)) {
+                 try {
+@@ -1095,6 +2176,7 @@
+                     }
+                 } catch (Exception exception2) {
+                     PlayerConnection.LOGGER.error("Couldn\'t select trade", exception2);
++                    this.disconnect("Invalid trade data!"); // CraftBukkit
+                 }
+             } else {
+                 TileEntity tileentity;
+@@ -1144,6 +2226,7 @@
+                         }
+                     } catch (Exception exception3) {
+                         PlayerConnection.LOGGER.error("Couldn\'t set command block", exception3);
++                        this.disconnect("Invalid command data!"); // CraftBukkit
+                     }
+                 } else if ("MC|AutoCmd".equals(s)) {
+                     if (!this.minecraftServer.getEnableCommandBlock()) {
+@@ -1211,6 +2294,7 @@
+                         }
+                     } catch (Exception exception4) {
+                         PlayerConnection.LOGGER.error("Couldn\'t set command block", exception4);
++                        this.disconnect("Invalid command data!"); // CraftBukkit
+                     }
+                 } else {
+                     int k;
+@@ -1234,6 +2318,7 @@
+                                 }
+                             } catch (Exception exception5) {
+                                 PlayerConnection.LOGGER.error("Couldn\'t set beacon", exception5);
++                                this.disconnect("Invalid beacon data!"); // CraftBukkit
+                             }
+                         }
+                     } else if ("MC|ItemName".equals(s)) {
+@@ -1320,6 +2405,7 @@
+                             }
+                         } catch (Exception exception6) {
+                             PlayerConnection.LOGGER.error("Couldn\'t set structure block", exception6);
++                            this.disconnect("Invalid structure data!"); // CraftBukkit
+                         }
+                     } else if ("MC|PickItem".equals(s)) {
+                         packetdataserializer = packetplayincustompayload.b();
+@@ -1332,14 +2418,37 @@
+                             this.player.playerConnection.sendPacket(new PacketPlayOutHeldItemSlot(this.player.inventory.itemInHandIndex));
+                         } catch (Exception exception7) {
+                             PlayerConnection.LOGGER.error("Couldn\'t pick item", exception7);
++                            this.disconnect("Invalid item data!"); // CraftBukkit
++                        }
++                    }
 +                    // CraftBukkit start
 +                    else if (packetplayincustompayload.a().equals("REGISTER")) {
 +                        String channels = packetplayincustompayload.b().toString(com.google.common.base.Charsets.UTF_8);
 +                        for (String channel : channels.split("\0")) {
 +                            getPlayer().addChannel(channel);
-+                        }
+                         }
 +                    } else if (packetplayincustompayload.a().equals("UNREGISTER")) {
 +                        String channels = packetplayincustompayload.b().toString(com.google.common.base.Charsets.UTF_8);
 +                        for (String channel : channels.split("\0")) {
@@ -1616,7 +1693,7 @@
 +                        byte[] data = new byte[packetplayincustompayload.b().readableBytes()];
 +                        packetplayincustompayload.b().readBytes(data);
 +                        server.getMessenger().dispatchIncomingMessage(player.getBukkitEntity(), packetplayincustompayload.a(), data);
-+                    }
+                     }
 +                    // CraftBukkit end
                  }
              }