I tried it and found it slow-going after The Code. Never finished it or State of Fear! This is the first I've heard of the lawsuit. I thought The Code was a great book and oddly was not offended by it, even as a Christian.
"Oddly" is an understatement. The book portrays an unrisen Christ marrying Mary Magdalene. All the book does is take a shot at the divinity of Christ, and the legitimacy of Chrisianity itself. So it is odd that that didn't offend you, maybe you should read 1 Corinthians 13-16:
13But if there be no resurrection of the dead, then is Christ not risen: And if Christ be not risen, then is our preaching vain, and your faith is also vain. Yea, and we are found false witnesses of God; because we have testified of God that he raised up Christ: whom he raised not up, if so be that the dead rise not. For if the dead rise not, then is not Christ raised: And if Christ be not raised, your faith is vain; ye are yet in your sins. Then they also which are fallen asleep in Christ are perished. 19If in this life only we have hope in Christ, we are of all men most miserable. 20But now is Christ risen from the dead, and become the firstfruits of them that slept. 21For since by man came death, by man came also the resurrection of the dead. 22For as in Adam all die, even so in Christ shall all be made alive. 23But every man in his own order: Christ the firstfruits; afterward they that are Christ's at his coming.