Dogars Books though helpful to some extent, but then they can't give you something tough to ponder upon. First try to buy some 'IQ Test' Books, i mean guud books that are guud and written/published by reputed writers/publishers. i can give you a few names which i remember: Check Your IQ (Ken Russules), Check Your Own IQ (H.J EYSENCK), Test Prep Your IQ, Test your IQ (Anand Sagar) etc etc. These books are better than Dogars and would help preparing you better.
And i dont know why i cant send you PMs.
Lastly, let me know of other queries.