NEW YORK (CBSNewYork) — By the side of every president is a first lady. That role isn’t only an influential one, it’s one that helped build America.

From Martha Washington to Melania Trump, author Andrew Och tells the untold stories behind the ladies of the White House in his new book, “Unusual For Their Time.”

For more information on Andrew’s new book, head over to his website. You can find him on Instagram at firstladiesman, and Twitter at 1stladiesAO.