Which fast diet/800/5:2 book?

[AmazingGreats]

Which book should I start with?
I want do eventually do the 5:2 but need to lose some weight first and was thinking of doing the 800

Bump

I like Dr Michael Mosley and his books,it's worth watching the Horizon documentary he did years ago on Fasting. I think it might still be on the iPlayer,but if not then on You Tube.

Another book recommendation is Delay don't Deny by Gin Stephens.

I would like to read a book by Dr MM but not sure which one up read first