Autodesk Revit API

[#1]

Is there any Books or other Resources available from which help can be taken for making applications. 

[#2 · Accepted solution]

Revit 2013 provide the online Revit Developer Guide. It is a good resource to get started and deep into Revit programming.

http://wikihelp.autodesk.com/Revit/enu/2013/Help/00006-API_Developer's_Guide

We provided the "My First Revit Plug-in" instruction for those who don't have any Revit programming skills.

http://usa.autodesk.com/adsk/servlet/index?siteID=123112&id=16777469

In addition to that, ADN recorded the DevTV to get started with Revit programming. You can find them in this page.

http://usa.autodesk.com/adsk/servlet/index?siteID=123112&id=2484975

Hope this helps.

[#3]

Thank you so much for your quick reply.