About the LCCN:
The Library of Congress Control Number, is a free LCCN, which is supplied to a publisher that registers with the Library of Congress when they register a book that
they are about to publish at least 1-2 months before the book is released and as they register the book with the Library of Congress. Here is that link pcn.loc.gov
Preassigned Control Number PCN Program. The SAN, ISBN's and the LCCN are three different numbers and they come from three different places. This LCCN
have nothing to do with the Copyright Registration and that is different as well. The LCCN is a number that The Library of Congress assigns to a book for the use of
the Library system to help the Library to catalog your book on their bookshelves. If the publisher does not apply for the LCCN for that book 3 months before
release date, you're in trouble. No one can apply for the LCCN after the book is released and that means your book will not be allowed in Libraries.