help with writer's block

I am stumped at the moment with my third book of the Gypsy series. I've decided that I cannot under any circumstances use the same plot themes of last two books--and so, what to do? that's why I've decided to put the question to those of you who have read Gypsy's Quest and Gypsy's Return. I now know the end but how to get there is a wilderness filled with thorny bushes too dense to move through.

Who would you like to see more of or learn about in this last book?
1. Kafir
2. Rifak
3. dragons
4. Vanatru
5. Loki/Freyja
6. Brandubh
7. Ella
8. Satyrs
9. Gypsy
10. Gunnar
11. you fill in the blank

Is solving the dilemma of having a child and the man she loves far in the future enough to sustain your interest in Gertrude's plight? Is the craziness going on in the future getting tedious? Time-travel is a tricky business and I've thought of several plot possibilities but have discarded them due to paradox or various other confusing issues...I've consulted Einstein's theories but I'm not a scientist! (nor a science fiction writer) I may just plow ahead, paradox or not, with one idea that interests me...if it doesn't work out I'll discard it to. Better to keep writing, I tell myself. Surely the characters will come to my aid like they've done in all the other books.

Thanks for any and all ideas!

Paradox

I'm 130 pages into Gypsy's Return and having one hell of a time. For one thing I'm out of my depth. I am not a sci-fi writer and yet I'm tackling a time-travel tale that encompasses all sorts of social and political themes. For instance, how do events in the past effect the future? Does anyone know the answer to this? The possibilities are endless. I was at first trying to follow a logical trajectory but have since decided that the law of unintended consequences is a better way to go. That way I don't have to explain why effecting a change for the better in genetic engineering policies led to a repressive and intolerant future. (what?)

And every day I find more fodder for my book. This is the first time I can look at what's going on in the world without being overly upset. The themes of global warming, poverty, frakking, mining disasters, over-population, depletion of natural resources, including water, are all perfect for my book. My heroine is attempting to make things better for future generations but what she doesn't realize is that serendipity can skew things wildly one way or the other. There is no straight line to anything.

The other paradox of all this is that the people in the future either have or don't have a memory of the world that was destroyed by past events...As the writer, I ask myself, what gives some the ability to recall a past that no longer exists? And what is it that keeps some from remembering? Or maybe, if I was writing logically, no one should remember. But if no one remembers how do I have interaction between my heroine and those she once knew in the future? aargh...

If anyone has a comment/answer to any of these questions I would be thrilled to hear it! And thanks for reading...