President Obama already has "senator" and "Commander in Chief" on his resume, but now he can add his newest achievement: Successful children's book author.

Random House Children's Books announced Tuesday that the president's latest book, "Of Thee I Sing: A Letter to My Daughters," is the fastest-selling picture book in the company's history. The publisher said 50,000 copies were sold in the first five days after the book's release.

Written before the president took office, the tome for tikes pays tribute to such celebrated Americans as Neil Armstrong, Jackie Robinson, and George Washington. Obama's proceeds will be donated to a scholarship fund for the children of fallen and disabled soldiers.

Over a million copies of another November presidential release by a Random House subsidiary, former president George W. Bush's "Decision Points," have flown off the shelves since the memoir hit bookstores November 9. The book is the third by a presidential author to top the million-copy mark, joining former president Clinton's "My Life" and President Obama's last two books, "The Audacity of Hope" and "Dreams from My Father."