Having gone through the 8

MGMAT guides, I am wondering what other books are recommended to delve deeper into Geometry, Combinatorics and Probability.

I have found the MGMAT a little lacking in these, as well as the Critical reasoning. For the CR, the Powerprep CR Bible was suggested to me, which I am reviewing and it is indeed quite helpful.

Any other suggestions for these 2 areas in Quant? I find the

MGMAT books good for the rest of the topics and don't have many issues with it. I found them rather scant on Geometry, especially with the co-ordinate planes etc. (i.e. I am relying more on my memory from HS than what I got from these books).

Thanks.