You may order books via this website direct from Gallopade or Amazon.  Almost all books are available from Amazon and other online booksellers.  You can also check your local school supply, book, museum or gift stores for many books; some may be happy to special order for you.  Carole Marsh Books are found in wonderful places, such as the National Archives, White House Gift Shop, Ellis Island National Historic Site, Mount Vernon, The Alamo, Grand Canyon, Tuskegee Institute—and, honestly, too many to name!

Retailers, books are available from Ingram.
Librarians…Follett, Baker & Taylor, and such.