republising of book

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My wife's grandfather was a philosopher and a writer. He had some great ideas about human life which is appreciated and encourged to publish by the greatest philosophers in India. He published a book in 1965 and in which he made an attempt at a synthesis of ancient philosophies of religions and modern philosophies of science.One of his friends assured him that he will publish his book worldwide. But before that he passed away. I came to read this book just a month ago, and I really amazed to read this book and I am sure that this is really unfortunate him that this book was not get enough popularity as it deserves.Now I would like to republish this book worldwide by any leading philosophical book publishers and thus to pay my tribute to that great writer. If anybody knows the names of leading philosophical book publishers,please give.