Spencer beats Emanuel: Diana's memory dominates the charts.

An unexpected battle has unfolded in the bestseller lists. Charles Spencer's memoir, "Swan Song: Diana, My Sister," debuted at number one on the New York Times nonfiction bestseller list, surpassing the highly publicized "Roll the Calls" by Hollywood super-agent Ari Emanuel.

Spencer's book offers a familial perspective on Lady Diana, drawing on their shared childhood and the princess's public life. Announced just one month before its release, the publication added an element of surprise to this publishing competition.

"Roll the Calls," published by Knopf on September 22, chronicles Emanuel's rise from the CAA mailroom to the pinnacle of the entertainment world, despite severe dyslexia. Despite an intense promotional campaign, the book had to settle for second place.

The outcome contrasts two worlds: the intimacy of a family memory against the behind-the-scenes machinations of Hollywood power. For now, the story of one of the most iconic figures of the last century has prevailed over the secrets of Hollywood dealmaking.