Well I tried pdfmasher and it is doing a good job of extracting the text - I would love to know how it does it.
It's just that I have spent so much money on pdf books and I am determined that I am not paying for them again.
My best solution to date now is to use pdfmasher or bliss and send to amazon for convert.
I am sure that someone will complete the next step and write a program to do a proper conversion, with a bit of AI logic. The sooner the better for all of us who bought technical books on pdf