Hey srinjoy!
There are multiple websites such as
1-https://www.goodreads.com/author/show/17118365.Er_Anurag_Mishra
2-https://www.scribd.com/document/400804053/Physics-for-IIT-JEE-Anurag-Mishra-Er-Anurag-Mishra-Mechanics-for-JEE-Main-Advanced-Volume-1-Shri-Balaji-2014
Where you can find links of the PDFs to be downloaded.
Best of luck!
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