What types of books are ineligible for a Library of Congress Control Number?

The Library of Congress sets strict guidelines about which books may receive a Library of Congress Control Number.
The following types of books are ineligible for Library of Congress Control Numbers:

• Books which do not list a U.S. city as place of publication on the title page or copyright page
• E-Books (i.e. books published in electronic format)
• Serials
• Custom editions
• Items under 50 pages with the exception of genealogies and children's literature and catalog exhibitions submitted by museums and art galleries
• Textbooks below the college level
• Items not intended for wide distribution to libraries
• Religious instructional materials
• Expendable educational materials
• Transitory or consumable materials, such as coloring books, comic books, and cut-out books.
• Music scores
• Crossword puzzle books