There is one book which is not directly related to the exam objectives but can give a very good idea about IT architecture,and i will strongly recommend it though its not one of those very exciting books.
IT Architectures and Middleware - Chris Britton
The questions asked in the exam were totally covered in the above reading.
One cautious note - There are several links posted in the forum and on internet, most of them are not up to date for SCEA 5 and one can save time by sticking to the books posted here or by the Cameron.
Two month of preparation is what i required for myself, first month being lighter and with second month being intense and studying for atleast 3-4 hrs a day.