If you are enquiring about NEET 2020, with less than 26 days left for the exam, you should solely concentrate on what you have learnt until now. Buying new books and studying them now might be stressful at this stage. But if you are preparing for NEET 2021, MHRD did mention that the NEET 2021 syllabus will be reduced and revised. And so buying any books might be a hasty decision. Nevertheless, to answer your question, 98% of the questions from NEET are asked from NCERT books. It is for the remaining 2% that you have to go for other vooks. Now NEET doesn't have deep rooted questions like JEE Advanced. So CENGAGE might be too much of a brainload. So stick with these books:

NCERT Physics Class XI & Class XII
Concepts of Physics by H. C. Verma
Objective Physics By DC Pandey
Fundamentals of Physics by Halliday, Resnick and Walker
Fundamental Physics by Pradeep
Problems in General Physics by IE Irodov