With $19.95 and a bit of patience, one could have reached the identical conclusion by watching the documentary, "Dreams Of My Real Father", which reveals the background behind Obama's birth and the inevitable conclusion that Mr. Davis was his real father.
Obama may now technically be considered "natural born" but he has publicly disclaimed his real father, yet he had not done so under oath. Had he written his book under oath, he would be bound by his statement and disqualified from office no matter who his real father was. Obama would be held accountable for his lie under oath.
The fact that his birth information was withheld, and then a bogus copy released to the public, should automatically disqualify Obama from the nation's highest office, on the ground of moral turpitude as it is a fraud upon the voters. Obama lied repeatedly in order to win an election, and while most lies are political in substance, Obama's lies attack the constitutional system itself. If Obama is to be believed, he was elected president despite his ineligibility by birth in his book about himself. He basically disregarded the constitutional requirement of being natural-born by pretending that his real father was a foreign citizen, attempting to set a precedent for non-Americans to someday become president.
Obama effectively nullified the constitutional requirement of natural-born by perpetrating a fraud, and for that he should be impeached.