--- a/net/minecraft/world/level/block/LecternBlock.java
+++ b/net/minecraft/world/level/block/LecternBlock.java
@@ -136,7 +_,24 @@
 
     private static void placeBook(@Nullable LivingEntity entity, Level level, BlockPos pos, BlockState state, ItemStack stack) {
         if (level.getBlockEntity(pos) instanceof LecternBlockEntity lecternBlockEntity) {
-            lecternBlockEntity.setBook(stack.consumeAndReturn(1, entity));
+            // Paper start - Add PlayerInsertLecternBookEvent
+            ItemStack eventSourcedBookStack = null;
+            if (entity instanceof final net.minecraft.server.level.ServerPlayer serverPlayer) {
+                final io.papermc.paper.event.player.PlayerInsertLecternBookEvent event = new io.papermc.paper.event.player.PlayerInsertLecternBookEvent(
+                    serverPlayer.getBukkitEntity(),
+                    org.bukkit.craftbukkit.block.CraftBlock.at(level, pos),
+                    org.bukkit.craftbukkit.inventory.CraftItemStack.asCraftMirror(stack.copyWithCount(1))
+                );
+                if (!event.callEvent()) return;
+                eventSourcedBookStack = org.bukkit.craftbukkit.inventory.CraftItemStack.unwrap(event.getBook());
+            }
+            if (eventSourcedBookStack == null) {
+                eventSourcedBookStack = stack.consumeAndReturn(1, entity);
+            } else {
+                stack.consume(1, entity);
+            }
+            lecternBlockEntity.setBook(eventSourcedBookStack);
+            // Paper end - Add PlayerInsertLecternBookEvent
             resetBookState(entity, level, pos, state, true);
             level.playSound(null, pos, SoundEvents.BOOK_PUT, SoundSource.BLOCKS, 1.0F, 1.0F);
         }
@@ -156,6 +_,16 @@
     }
 
     private static void changePowered(Level level, BlockPos pos, BlockState state, boolean powered) {
+        // Paper start - Call BlockRedstoneEvent properly
+        final int currentRedstoneLevel = state.getValue(LecternBlock.POWERED) ? 15 : 0, targetRedstoneLevel = powered ? 15 : 0;
+        if (currentRedstoneLevel != targetRedstoneLevel) {
+            final org.bukkit.event.block.BlockRedstoneEvent event = org.bukkit.craftbukkit.event.CraftEventFactory.callRedstoneChange(level, pos, currentRedstoneLevel, targetRedstoneLevel);
+
+            if (event.getNewCurrent() != targetRedstoneLevel) {
+                return;
+            }
+        }
+        // Paper end - Call BlockRedstoneEvent properly
         level.setBlock(pos, state.setValue(POWERED, powered), 3);
         updateBelow(level, pos, state);
     }
@@ -243,8 +_,7 @@
 
     private void openScreen(Level level, BlockPos pos, Player player) {
         BlockEntity blockEntity = level.getBlockEntity(pos);
-        if (blockEntity instanceof LecternBlockEntity) {
-            player.openMenu((LecternBlockEntity)blockEntity);
+        if (blockEntity instanceof LecternBlockEntity lecternBlockEntity && player.openMenu(lecternBlockEntity).isPresent()) { // Paper - Fix InventoryOpenEvent cancellation
             player.awardStat(Stats.INTERACT_WITH_LECTERN);
         }
     }
