It's true that not much ready made material available for OCPJP 7 except Ganesh and Tushar's book. Mala's book is for OCAJP and K&B's book is delayed too much (I am not sure whether its going to come).
Thus, you don't have option other than Tushar's book; its a good one, you can rely on it. Apart from this book, you can search material for independent topics and learn from internet. This blog also can provide you some relevant information. You can also refer Head first Java and SCJP book by K&B.