Hi there aspirant! Hope you're doing well.

For engineering mathematics- Dr.B.S.Grewal

For network analysis- William Hayt's book

For Digital Electronics- Digital Logic Design by Morris M.Mano

1. Understand that you cannot get 100 marks in GATE :) I think even 90 is a tough ask. Toppers answer around 85-90 marks (of course it depends on the paper's difficulty, but the general trend is this).

2. NEVER OMIT ANY subject. I find most students omit a subject based on the weightage. The problem with this approach is often it happens that the subject you omit will have some really easy questions and the subject you prepare well has much harder problems to solve.

3. Self-study works, but I would suggest joining a coaching institute. I didn't have good faculty for some subjects in my under-graduate program and I was amazed at how well I can understand a concept when taught by a really competent faculty.

4. Maths will make a huge difference in your scores. Around 30 marks (including aptitude) is really easy to score. They are usually less difficult and direct than subject questions.

5. Solve as many previous year GATE problems as you can.

6. Learn concepts only from standard books that was prescribed for your under-graduate program. Notes, ppts may not give you complete knowledge.

7. Use standard books.

8. Solve 10–15 Questions Daily.

9. use standard books.

For Electronic Devices and Circuits - book by Dr.Lal Kishore is preferrable.

If you want a detailed explanation of all the GATE subjects go for the book written by Kishore Kashyap.

Hope this helps. Thank you.