While Barack Obama’s presidency has come to a close, nearly two million photographs documenting this landmark era remain—all taken by Pete Souza, who served as President Obama’s chief official White House photographer. In his new book, Obama: An Intimate Portrait, Souza will offer a look through his lens at what it was like to be alongside the leader of the free world in both moments of great victory and immense challenge.

Souza served as the chief official White House photographer for the entire eight years of the Obama administration. He’ll discuss what it was like to capture both the most important moments of the presidency as well as unguarded ones with the Obama family.

Note: Pre-signed bookplates will only be available to people who purchase a copy of Obama: An Intimate Portrait from The Commonwealth Club.