To prepare for the CUET UG (Common University Entrance Test), the specific books you need to read will depend entirely on the subjects you choose to appear for in the exam. CUET UG has three sections:

Section IA & IB: Languages: If you choose any language (like English or Hindi), you should focus on books that help improve your reading comprehension, grammar, and vocabulary. For English, popular choices include "Objective General English" by S.P. Bakshi and "High School English Grammar and Composition" by Wren & Martin. For Hindi, you can refer to "Lucent's Samanya Hindi."

Section II: Domain-Specific Subjects: This section covers subjects you studied in your Class 12th. The best books for these subjects are primarily your NCERT textbooks for Class 11 and 12 . These books form the core of the CUET syllabus for the domain subjects. Along with NCERTs, you can also refer to other standard textbooks that you used during your Class 12th preparation for a more in-depth understanding and practice. For example, for Physics, you might use H.C. Verma's "Concepts of Physics," for Chemistry, you could refer to "Modern's ABC of Chemistry," and for Biology, "Trueman's Biology." Additionally, solving NCERT Exemplar problems for each subject is highly recommended.

Section III: General Test: If your chosen course or university requires you to take the General Test, you'll need to prepare for General Knowledge, Current Affairs, General Mental Ability, Numerical Ability, Quantitative Reasoning, and Logical and Analytical Reasoning. For General Knowledge, you can use "Lucent's General Knowledge" or "Arihant General Knowledge." For Quantitative Aptitude and Reasoning, books like "Quantitative Aptitude for Competitive Examinations" by R.S. Aggarwal and "A Modern Approach to Logical Reasoning" by R.S. Aggarwal are helpful. Regularly reading newspapers and magazines will also aid in Current Affairs.