I'm not quite understanding your question about whether it's okay.
If you are asking if it's legal, no, it isn't. By downloading the file, you are creating an unauthorized copy of a copyrighted book.
If you are asking whether it's ethical, that's a completely different question, but I'd probably say no to that one as well. That one's up for a lot more debate.
If you are asking if you will get in trouble, the answer is almost definitely no. The fact that TPB operates internationally makes it a jurisdictional nightmare, and I don't ever see an international copyright case against millions of users happening.
Electronic/Media Services Librarian
Southwest Baptist University
From: Code for Libraries [mailto:[log in to unmask]] On Behalf Of don warner saklad
Sent: Tuesday, April 03, 2012 3:29 PM
To: [log in to unmask]
Subject: [CODE4LIB] With piratebay.se is it "okay" to read the book To Kill a Mockingbird by Harper Lee at http://thepiratebay.se/torrent/4552673/Harper_Lee_-_To_Kill_a_Mockingbird_ORIGINAL_FULL_ebook_pdf
With piratebay.se is it "okay" to read the book
To Kill a Mockingbird by Harper Lee