That's a very proactive question for maximizing your scores! To excel in the CBSE Class 10 Board Exam, choosing the right reference books is vital for practice beyond the NCERT.

The best reference books provide:

1. In-depth Concepts: They clarify complex theories (especially in Science and Maths).

2. Abundant Practice: They offer a large bank of practice questions and previous years' board questions (PYQs).

3. Solutions: They include detailed, step-by-step solutions to ensure you understand the methodology.

Your best strategy is to combine the NCERT (your primary source) with one or two high-quality reference books for intensive practice. The Careers360 page provides an expert-curated list of the Best Reference Books for CBSE Class 10 across all subjects: https://school.careers360.com/boards/cbse/cbse-best-reference-books-for-cbse-class-10-exam . This selection will help you secure higher marks!