Where Did Cain Get His Wife?

If all humans descended from Adam and Eve, where did their first son Cain get his wife?

The answer to this, as well as many other questions often raised by Bible critics, is given in the book Is the Bible Really the Word of God?

This 192-page, hardbound book is only 25 cents, postpaid.

Please send the book Is the Bible Really the Word of God?; I enclose 25c.