Do I need a Library of Congress Control Number for my Book? What is a LCCN? by eliteonlinepublishing | Nov 9, 2020 | BlogYou may be asking, “Do I need a Library of Congress Control Number for my Book? ” and “What is a LCCN?” The answer: yes and no. Or, even, “It depends.” Yes, if you. want your book to be cataloged in the largest library, then you need an LCCN...