Enthuware

Is it enough studying mala gupta and enthuware mock tests for the IZO-803 exam.. Do you suggest any other book?

If you are passing our mock exams in the first attempt, then you are doing good. If not, you should stop taking the mock exams and go through another book.

HTH,
Paul.

Which book do you suggest after mala gupta?

Multiple books are not really required but if you are not satisfied with Mala Gupta, you can try this one.