It's not what you write, it's how you write it.

There are only thirty-six different novel plot patterns:

1. Supplication - Persecutor, Suppliant, a Power in Authority
2. Deliverance - Unfortunates, Threatener, Rescuer
3. Revenge - Avenger, Criminal
4. Vengeance by Family upon Family - Avenging Kinsman, Guilty Kinsman, Relative
5. Pursuit - Fugitive from Punishment, Pursuer
6. Victim of Cruelty or Misfortune - Unfortunates, Master or Unlucky Person
7. Disaster - Vanquished Power, Victorious Power or Messenger
8. Revolt - Tyrant, Conspirator(s)
9. Daring Enterprise - Bold Leader, Goal, Adversary
10. Abduction - Abductor, Abducted, Guardian
11. Enigma - Interrogator, Seeker, Problem
12. Obtaining - Two or more Opposing Parties, Object, maybe an Arbitrator
13. Familial Hatred - Two Family Members who hate each other
14. Familial Rivalry - Preferred Kinsman, Rejected Kinsman, Object
15. Murderous Adultery - Two Adulterers, the Betrayed
16. Madness - Madman, Victim
17. Fatal Imprudence - Imprudent person, Victim or lost object
18. Involuntary Crimes of Love - Lover, Beloved, Revealer
19. Kinsman Kills Unrecognised Kinsman - Killer, Unrecognised Victim, Revealer
20. Self Sacrifice for an Ideal - Hero, Ideal, Person or Thing Sacrificed
21. Self Sacrifice for Kindred - Hero, Kinsman, Person or Thing Sacrificed
22. All Sacrificed for Passion - Lover, Object of Passion, Person or Thing Sacrificed
23. Sacrifice of Loved Ones - Hero, Beloved Victim, Need for Sacrifice
24. Rivalry Between Superior and Inferior - Superior, Inferior, Object
25. Adultery - Deceived Spouse, Two Adulterers
26. Crimes of Love - Lover, Beloved, theme of Dissolution
27. Discovery of Dishonor of a Loved One - Discoverer, Guilty One
28. Obstacles to Love - Two Lovers, Obstacle
29. An Enemy Loved - Beloved Enemy, Lover, Hater
30. Ambition - An Ambitious Person, Coveted Thing, Adversary
31. Conflict with a God - Mortal, Immortal
32. Mistaken Jealousy - Jealous One, Object of Jealousy, Supposed Accomplice, Author of Mistake
33. Faulty Judgment - Mistaken One, Victim of Mistake, Author of Mistake, Guilty Person
34. Remorse - Culprit, Victim, Interrogator
35. Recovery of a Lost One - Seeker, One Found
36. Loss of Loved Ones - Kinsman Slain, Kinsman Witness, Executioner

And in the world, there are about... oh, a billion different books. So? So, that means that all the books out there had one of these plot lines.

With all the lack of plot lines, it's important that to make it less about what you write about and more about how you write it. And that means studying the art of writing.