To the best of my knowledge there are two books at present, but only for the part I exam. Boyarsky and Selikoff, which you know about, and Hanumant Deskmukh's book. I don't know anything about availability in India.
2) I see it on Amazon India as a Kindle book. The paper book says it is due for import in January. (I have no special knowledge, I just searched on Amazon.in)
It does say that! It's an estimate of course. (We are working on writing it!). The publishers estimate for the 1Z0-815 book was spot on though so April 20th looks promising.