@SubscribeEvent
	public void onPlayerClickEvent(RightClickBlock event)
	{
		EnumHand hand = event.getHand();
		ItemStack stacktoAdd = new ItemStack(Items.BOOK);
		ItemStack stack = event.getEntityPlayer().getHeldItem(hand);

		if (event.getEntity() instanceof EntityPlayer)
		{
			if(stack != null && event.getEntityPlayer().getHeldItem(hand).getItem() == Items.BOOK)
			{
				if (event.getWorld().getBlockState(event.getPos()).getBlock() == Blocks.BOOKSHELF)
				{
					if (!event.getWorld().isRemote)
					{
						event.getWorld().setBlockState(event.getPos(), Blocks.DIRT.getDefaultState());
					}
				}
			}
			else
			{
				event.getEntityPlayer().inventory.addItemStackToInventory(stacktoAdd);
			}
		}
	}