Adams and his wife Abigail exchanged over 1,100 letters, which provided a remarkable first-person account of their relationship and the birth of our nation and became the source material for the McCullough biography.

Today, it's easy to forget the value of a handwritten letter, but the written word holds a singular place in America’s story. HBO approached the U.S. Postal Service – who delivered the Adams’ letters – to highlight the enduring nature of the written word. The ‘Power of the Letter’ campaign celebrated the importance of Adams’ letters and encouraged more Americans to send hand written notes.

Highest rated HBO Original Film in five years.Bartered promotional assets to generate over 3.5 BILLION impressions:- 331MM retail impressions at 12,786 USPS locations (6’ standees and window clings).- 52.4MM online impressions at USPS.com (banner ads and branded takeover of the USPS.com Home Page the week before the Premiere).- National Stamp Cancellation included on 3.3 Billion pieces of first class mail (included Adams quote and promotional URL).- Promotional message on 225MM customer receipts.Generated over 8MM media impressions from national press coverage (including New York Times feature by Stuart Elliott).