[hispanic]

The resource I've heard recommended most often is "The Complete Guide to Fasting: Heal Your Body Through Intermittent, Alternate-Day, and Extended Fasting" by Fung and Moore. I just checked-out a copy from my library and will be reading it soon.

[swarnie_]

I have no idea what a library is but i found this on Amazon for 9 British Roubles.