There is only one book to turn to for how to have a Godly marriage and that is the Bible. My wife and I use it often as well as every married couple should!
satan wants us in hell because every person who goes to hell is a victory for the devil, he thinks he wins. What satan fails to realize is that he has already been defeated when Jesus resurrected from the dead. his head was crushed.
Next time satan reminds you of your past remind him of his future!