Hey aspirant,

For CUET pg exam best way to prepare is by studying NCERT thoroughly. More than that you can refer following books.

For language comprehension, English grammar and comprehension by Wren and Martin. Language comes under section 1A and 1B.

Section 2 domain, for that refering NCERT is the best choice.

Section 3 ,for mathematics, Quantitative aptitude for competitive examination. Or Abhijith Guptha book. For data interpretation - RS Sharma data interpretation. General awareness or current affairs - Arihant or disha experts. Teaching aptitude by KC Vasishta. Logical awareness and analytical skills - RS Agarwal a modern approach to logical reasoning

Additional to these books, you can also refer Oswal practice set or Drishti past year aptitude tests.