Pop up window from external source

Just an idea. You may want to open a 2D Texture with background image as that book's HTML content. For that to happen, you will need to store the HTML in image format.

So when you click on the book, an object can become visible in front of the camera and that will have the book content as its texture. Clicking on another book can refresh the texture with the other book's content. There are enough APIs to make the object visible disappear or appear when clicked. To move the book forward when clicked, you can use something like this (put this script on the book - change this the way you want - this is just an example):

var wasClicked : boolean;

var targetWall : GameObject; // this is your object that can appear/disappear on book click

function OnMouseDown() {

wasClicked = true;

Activate();

}

function OnMouseUp() {

wasClicked = false;

Deactivate();

}

function OnMouseEnter() {

if (wasClicked) {

 Activate1();  // wasClicked is true - now you want the popup

}

}

function OnMouseExit() {

Deactivate();

}

function Activate() {

renderer.material.color = Color.red; //replace this with lighten up the book's material

transform.Translate(Vector3(0, 0, 1) * Time.deltaTime);

}

function Activate1() {

//Find the object that is disabled - your popup - and make it visible

targetWall.renderer.material.mainTexture = Resources.Load("<your HTML page texture>", Texture2D);

}

function Deactivate() {

renderer.material.color = Color.white; //replace this with dim the book's material

transform.Translate(Vector3(0, 0, -1) * Time.deltaTime);

}