In case everyone is done with the Oxford ATPL stuff... Instead of going with the "CHAMPAKS" and " CHACHA CHAUDHARY".......
Try your hands on the book by Keith Williams...
The name of the book is 1000 Q & A on General Navigation.... Performance... Principle of Flights..... etc etc....
Heard its a good book !!!
(Let me also know if u get a copy online... Searched toooo hard for it... No luck !!)