If you are looking for a comprehensive reference book rather than preparation notes, consider these standard academic texts:
Biochemistry by U. Satyanarayana (the same author) is sometimes available through government e-libraries like NPTEL or Swayam for free viewing, though not download. Prasad Biochemistry Pdf
Council of India has revised the syllabus for biochemistry, especially enhancing the topics on Clinical Biochemistry. Accordingly, If you are looking for a comprehensive reference