Doubt about idt book - final

Backiya (Executive) (84 Points)

26 February 2013  

Hi friens . My final attempt is Nov 2013 . I plan to purchase book for IDT now , but all books are printed as applicable for  May 2013 exam . please confirm that i need to purchase IDT book again after may or else ?? If i purchase now , what i have to do for further after may month for Nov 2013 exam ?? Please help me