Adding text to written books???

This is my structure. What would I put for "Set NBT text tag" so the books won't say, "Invalid book tag"?

I clicked on the image button, and it asks for a URL. I can't seem to upload images from my computer directly.

https://www.pythonanywhere.com/user/EnsurdFrndship/files/home/EnsurdFrndship/structure2.jpg

I am using Java, but don't know how to apply '{pages:['{"text":"Soemthing"}]}' to the structure while working with the visual structure.

I tried...

(new Object() {
					public ItemStack getItemStack(BlockPos pos, int sltid) {
						AtomicReference<ItemStack> _retval = new AtomicReference<>(ItemStack.EMPTY);
						TileEntity _ent = world.getTileEntity(pos);
						if (_ent != null) {
							_ent.getCapability(CapabilityItemHandler.ITEM_HANDLER_CAPABILITY, null).ifPresent(capability -> {
								_retval.set(capability.getStackInSlot(sltid).copy());
							});
						}
						return _retval.get();
					}
				}.getItemStack(new BlockPos((int) (x + (xval)), (int) (y + (yval)), (int) (z + (zval))), (int) (0))).getOrCreateTag()
						.putString("pages", "['{\"text\":\"Soemthing\"}']");

  ... but each book still says, "Invalid book tag."

I am assuming that I need the proper "NBT text tag"(s) assigned before my values can create books in Minecraft that doesn't say "* Invalid book tag*" in them when I open them. I just don't know what to put in "Set NBT text tag" when working with the visual structure of my procedure, in order to create books with custom made text in them.

I heard for a 'written book' to be 'valid', there has to be an "author", a "title" and the title has to be under 256 characters. The code (below, which supposedly sets the author and the title) meets all the requirements, and my books STILL say, "* Invalid book tag *"... 

				(new Object() {
					public ItemStack getItemStack(BlockPos pos, int sltid) {
						AtomicReference<ItemStack> _retval = new AtomicReference<>(ItemStack.EMPTY);
						TileEntity _ent = world.getTileEntity(pos);
						if (_ent != null) {
							_ent.getCapability(CapabilityItemHandler.ITEM_HANDLER_CAPABILITY, null).ifPresent(capability -> {
								_retval.set(capability.getStackInSlot(sltid).copy());
							});
						}
						return _retval.get();
					}
				}.getItemStack(new BlockPos((int) (x + (xval)), (int) (y + (yval)), (int) (z + (zval))), (int) (0))).getOrCreateTag()
						.putString("author", "Michael S. Lowe");
				(new Object() {
					public ItemStack getItemStack(BlockPos pos, int sltid) {
						AtomicReference<ItemStack> _retval = new AtomicReference<>(ItemStack.EMPTY);
						TileEntity _ent = world.getTileEntity(pos);
						if (_ent != null) {
							_ent.getCapability(CapabilityItemHandler.ITEM_HANDLER_CAPABILITY, null).ifPresent(capability -> {
								_retval.set(capability.getStackInSlot(sltid).copy());
							});
						}
						return _retval.get();
					}
				}.getItemStack(new BlockPos((int) (x + (xval)), (int) (y + (yval)), (int) (z + (zval))), (int) (0))).getOrCreateTag()
						.putString("title", "Scripture");
				(new Object() {
					public ItemStack getItemStack(BlockPos pos, int sltid) {
						AtomicReference<ItemStack> _retval = new AtomicReference<>(ItemStack.EMPTY);
						TileEntity _ent = world.getTileEntity(pos);
						if (_ent != null) {
							_ent.getCapability(CapabilityItemHandler.ITEM_HANDLER_CAPABILITY, null).ifPresent(capability -> {
								_retval.set(capability.getStackInSlot(sltid).copy());
							});
						}
						return _retval.get();
					}
				}.getItemStack(new BlockPos((int) (x + (xval)), (int) (y + (yval)), (int) (z + (zval))), (int) (0))).getOrCreateTag()
						.putString("text", "This is page 1 of my book.");

I even tried...

(new Object() {
					public ItemStack getItemStack(BlockPos pos, int sltid) {
						AtomicReference<ItemStack> _retval = new AtomicReference<>(ItemStack.EMPTY);
						TileEntity _ent = world.getTileEntity(pos);
						if (_ent != null) {
							_ent.getCapability(CapabilityItemHandler.ITEM_HANDLER_CAPABILITY, null).ifPresent(capability -> {
								_retval.set(capability.getStackInSlot(sltid).copy());
							});
						}
						return _retval.get();
					}
				}.getItemStack(new BlockPos((int) (x + (xval)), (int) (y + (yval)), (int) (z + (zval))), (int) (0))).getOrCreateTag().putString(
						"pages",
						"['{\"text\":\"Minecraft Tools book\"}'],title:Scriptures,author:\"Michael S. Lowe\",display:{Lore:[\"Scriptures\"]}");
				if (((world.getBlockState(new BlockPos((int) (x + (xval)), (int) (y + (yval)), (int) (z + (zval))))).getBlock() == Blocks.STONE
						.getDefaultState().getBlock())) {
					world.setBlockState(new BlockPos((int) (x + (xval)), (int) (y + (yval)), (int) (z + (zval))), Blocks.CHEST.getDefaultState(), 3);
				}