Sorry! Here we can't provide you ebook. But we can avail you a list of books for the preparation of CAT or any MBA preparation. The name of the books are stated below:

1. Quantitative Aptitude for the CAT- by Nishit K. Sinha

2. Quantitative Aptitude for All Competitive Examinations- by Abhijit Guha

3. A Modern Approach to Verbal & Non-Verbal Reasoning- by R.S. Aggarwal

4. Trishna’s Verbal Ability and Logical Reasoning for the CAT and Other MBA Examinations- by T.I.M.E

5. Logical Reasoning and Data Interpretation for the CAT- by Nishit K. Sinha

You can also follow:

• NCERT books;
• Word Power Made Easy by NORMAN LEWIS and
• Wren and Martin English Grammar.

I hope my answer helps. All the very best for your future endeavors!