Obama's tribute to 13 American ground breakers, "Of Thee I Sing," was in the top 25 on Amazon.com and Barnes & Noble.com as of Wednesday morning, less than two days after the children's book was announced and two months before its scheduled release. Random House Children's Books plans a first printing of 500,000 copies.
Both of Obama's previous works, the memoir "Dreams From My Father" and the policy book "The Audacity of Hope," are million sellers.
