Hi
I advise you the following books
For Financial Accounting - Hanif & Mukherjee
For Law - Munish Bhandari
For Direct Tax - Singhania
For Indirect Tax - VS Datey
Reg. other subject let our seniors advise you. In addition to above books, you MUST complete d practical problems given in cwa inst. material and also the RTP given in icwai.org link for all the relevant subjects. And in last if you hv time refer scanners. But as you mentioned your attempt is in Dec10, u have very less time and a lot to study from above books (if u hv not yet started ur study), so i think you have to spend more time to complete all those said above. More time for preparation is needed from your end, otherwise its a difficult task for u to appear in Dec10, as per my advise u go for one group with full knowledge. All the best.