Warning: the following might cause dizziness and/or high anxiety.
“Abortion on demand is the ultimate State tyranny; the State simply declares that certain classes of human beings are not persons, and therefore not entitled to the protection of the law.” Ron Paul
You might consider the following books by Dr. Paul.
“Abortion and Liberty” (it’s free online) and “Challenge to Liberty: Coming to Grips with the Abortion Issue.”
"[T]he federal government has no authority whatsoever to involve itself in the abortion issue. So while Roe v. Wade is invalid, a federal law banning abortion across all 50 states would be equally invalid." --Ron Paul, from his own website