Hello there,

Understanding the concepts from the core will require books. And it is one of the most important practices for the preparation. It gives you a proper understanding of the important topics.

Here is the link attached from the official website of Careers360 which will provide you with the E-books of all the subjects of Bihar board. Hope it helps!

https://www.careers360.com/download/bihar-board-10th-ebooks-and-sample-papers

thank you!