Regarding PDFs of the textbooks
<p>I was reading some mathematics books and I observed that most of them have either of these mentioned before preface.</p>

<p>Case I</p>

<blockquote>
  <p>Copyright: All right reserved by XYZ</p>
</blockquote>

<p>or </p>

<p>Case :II</p>

<blockquote>
  <p>Copyright: All rights reserved. No part of this book may be reproduced
  in any form without the written permission of the publishers.</p>
</blockquote>

<p>I am actually travelling next week and I won't be able to carry the books physically. I was thinking of downloading the PDFs of the book from sites like Libgen.</p>

<p>I think it would be illegal and unethical to do that in case II because writer strictly prohibits that.</p>

<p>Am I free to download and read the PDF of the book in Case I.</p>

<p>P.S.: I live in India.</p>

<p>Libgen is a well-known piracy service. The probability is very high that a work you find there is copied and distributed illegally. </p>

copyright internet online-piracy