So far I have heard the following sources to be good for Step II
1. UW (a must do thing)
2. Boards and wards for step 2 and 3
3. Crush or secrets step II - choose based on which format works for you
(can chose either 2 or 3 OR 2 and 3..depends how much time you have)
4. If still have time then Kaplan QBook and
5. if still have time..do the kaplan notes or FA for step II (i think it doesn't have surgery notes in it so you might have to buy FA for surgery as well but i am not too sure on this one)
but i have heard 1, 2, 3, and 4 should be more than enough,.
Good luck