Did you know that David's book "John Adams" was intended to be a very different book? The more he learned about Adams, the more David was convinced that this relatively unheralded Founding Father needed his life's story told in full. Video via History in Five. | David McCullough

The great David McCullough discusses how his three books -- "The Great Bridge," "The Wright Brothers," and "The Path Between the Seas" -- represent an unofficial trilogy about the American spirit, ingenuity, engineering, and courage. History lessons like this right to your mailbox each month. Subscribe: http://bit.ly/1RUXzZQ | History in Five

26K views · 1.2K reactions | David discusses his lifelong love of libraries and the vital role that librarians play in his research and writing. | David McCullough | Facebook

1.6K views · 71 reactions | The audiobook edition of "The Pioneers" is available now. Listen to this excerpt to learn about the moment dauntless pioneers set off for the Northwest Territory. | David McCullough | Facebook