I overestimated by £4. It's not a maths book, luckily. 

So £165 needed now... and just over a week to go....

I'm now 95% funded - huge thanks to everyone who has pledged and got me so close to the finish line. I need only £169 to get there now...

I first read about nanobots in New Scientist, which is also where I discovered how close we are to creating convincing synthetic humans. And sitting with my mother, feeding her mushy food with a spoon, in the care home where she ended her days, I wondered if these inventions would arrive in time to help her. And if they did, what would happen. What would it be like if she were restored to health?

Thank you to all of you who've pledged. I'm nearly 20% of the way there now, with another two months to go. If you know anyone who might like to help, please give them a nudge.

I've been planning a short film to help publicise the book, and with luck I'll shoot it on Tuesday. The actress who will play the part of Winifred unfortunately had an accident and burnt herself so it's taken a little longer…