Hi Chris,

I have just found out GRIHA version 2015 into my limelight.
But the things that you are looking for which is month wise solar
insolation on any facade and related things like how does the sun rays vary
as per facade and year is provided in it.
It can be a handy book to learn many things but i am talking about the
older version i.e version-1.

It has five volume covering thousands of pages and has monstrous knowledge.
Just find attached the GRIHA_Flyer.It has the guideline to buy the books.
Find out more things:
@
http://www.grihaindia.org/index.php?tion=com_content&view=article&id=78&t=library

Hope it is handy.

Thanks,

Sharad.Kumar|Engineer.

Green Horizon Consulting LLP.

Gurgaon.

India.