javascript-objects.js

var book = {
  tarzan : { publisher: "Pub A", author: "Author A", pageCount: 300}, 
  cinderella : { publisher: "Pub B", author: "Author B", pageCount: 400},
  "hidden universe" : { publisher: "Pub C", author: "Konstantin", pageCount: 1000},
  addBook : function(name, publisher, author, pageCount) {
    this[name] = {publisher: publisher, author:author, pageCount};
  }
};

book.addBook('JS Objects', "Publisher Z", "Konstantin", 300); 
console.log(book);