Doubt in Book (.indb)

Question

Hi All,
Requirement:
How can we use book concept (.indb). Actually i have script for override all master page item in the active Document only.
But I want to override all the BookContents in the active Book(.indb) (i.e., folio1.indd, folio2.indd, folio3.indd, folio4.indd, folio5.indd) see attachment.
Here is trying code:
For the single document only (working good):
var myDocument = app.activeDocument
var myPages = myDocument.pages;
for(i=0; i < myPages.length; i++) {
     OverrideMasterItems();
function OverrideMasterItems() {
  var allItems = myDocument.pages[i].appliedMaster.pageItems.everyItem().getElements();
  for(var j=0;j<allItems.length;j++){
    try{allItems[j].override(myDocument.pages[i])}
    catch(e){}
But my requirement is override all master page item through book(.indb)
Trying code is (not working):
//Over writing the master page elements through Book(.indb)
var myBook = app.books[0]
var myBookContents =app.books[0].bookContents.everyItem().getElements()
var myPages = myBookContents.pages;
for(i=0; i < myPages.length; i++) {
     OverrideMasterItems();
function OverrideMasterItems() {
  var allItems = myBook.pages[i].appliedMaster.pageItems.everyItem().getElements();
  for(var j=0;j<allItems.length;j++){
    try{allItems[j].override(myBook.pages[i])}
    catch(e){}
I am the beginner. Book Concept is entirely new for me. Please anyone give solution.
For Reference kindly see the attachment
Thanks in advance
BEGINNER_X

Answer 1

Hi Hans/All,
Thanks for your reply....
Using forum i got a script for open and close all the book contents. Its works fine.
Code is below (working good):
//Open all the Book Contents in the book
for( var i = app.activeBook.bookContents.length-1 ; i>=0 ; i--)
app.open (app.activeBook.bookContents[i].fullName, true)
////Close all the Book Contents in the book
for( var i = app.activeBook.bookContents.length-1 ; i>=0 ; i-- )
            app.open (app.activeBook.bookContents[i].fullName, false).close(SaveOptions.ASK);
But as per my requirement i want to open all the documents(bookContents) in the book, override all master page elements and close all the documents in the book
Trying Script is:
for( var i = app.activeBook.bookContents.length-1 ; i>=0 ; i-- )
            app.open (app.activeBook.bookContents[i].fullName, true)
            bookOverrideMasterItems ()
            app.open (app.activeBook.bookContents[i].fullName, false).close(SaveOptions.ASK);
function bookOverrideMasterItems()
    var myDocument = app.open (app.activeBook.bookContents[i].fullName, true);
    var myPages = myDocument.pages;
    for(i=0; i < myPages.length; i++) {
     OverrideMasterItems();
function OverrideMasterItems() {
  var allItems = myDocument.pages[i].appliedMaster.pageItems.everyItem().getElements();
  for(var j=0;j<allItems.length;j++){
    try{
        allItems[j].override(myDocument.pages[i]);
    catch(e){}
Please find the screenshot of error and my book(.indb)