The book celebrates 13 `` groundbreaking '' Americans . Random House says the manuscript was completed before the president took office . Hide Caption 1 of 10 Photos: Washington ( CNN ) -- Half a million copies of a new children 's book by President Barack Obama hit the shelves Tuesday . Proceeds will be donated to the children of fallen and disabled soldiers .
The book celebrates 13 `` groundbreaking '' Americans . Random House says the manuscript was completed before the president took office . Hide Caption 1 of 10 Photos: Proceeds will be donated to the children of fallen and disabled soldiers .