Help! My Novel Needs a Title!

I need some help people! My manuscript for the fourth Redcliffe novel is progressing speedily now that I am back in the groove, but at the moment it still doesn't have a title. Now I am not too concerned at present, because I have a long way to go before the book is ready to publish. However, I sort of feel the need to give it a name. It needs an identity of its own, and not just Redcliffe book 4, as I currently refer to it as. Can you help?

OK, so, where do we start? I think about how I named my first three novels in the series. Love Hurts (A Redcliffe Novel) was named almost from the start of writing it really. I got the name from that classic rock ballad by the band Nazareth. It seemed to fit somehow, and for those of you who read the book, you may remember the sneaky reference I put in there...

Moving on from that, I chose Love Kills (A Redcliffe Novel) as the title for my second novel because it was just right. Again, I liked the short, sharp header, and it is appropriate for the content of the story. Finally, my third novel Love Redeems (A Redcliffe Novel) also came naturally. Once I named the first book in the series and knew that I was writing two more, it was easy to pick titles. They all had to connect, and they all reflect the themes of the stories.

Now I have a dilemma. Do I choose a title for book 4 that also includes the word 'love' or do I move away from that? You see, the first three novels form a trilogy, but now I plan to write another three in the series. They may form a separate trilogy, I am not sure, so perhaps I can move on to a new theme. However, they follow on with the story that emerged in Love Redeems, and so I need some sort of correlation I think. I don't know! If you can help, please do... I await your suggestions and advice.