The book "Abstract Algebra" is written by several authors, including Sen, Ghosh, and Mukhopadhyay. The book is likely a comprehensive textbook on abstract algebra, covering topics such as group theory, ring theory, field theory, and more.

I'm not aware of any freely available PDF versions of the book, and I wouldn't recommend searching for "cracked" or pirated versions. Instead, you can try checking online bookstores, libraries, or your university's bookstore to see if they have a copy of the book.

That being said, I can try to provide you with some information that might be helpful.