Andy milroy's book "training for ultras" published by the Road Runners Club, short (or long) contributions from several ultra running stars. Have a look at William Sichel's website www.williamsichel.co.uk
He's got some pages which answer ultra related questions.
Comments
www.ultrarunning.org.uk
www.ultramarathonworld.com
particularly nice set of articles on:
www.timeoutdoors.com/
Jim
Review on US amazon:
http://www.amazon.com/exec/obidos/tg/detail/-/0062736744/qid=1067439876/sr=8-2/ref=sr_8_2/002-8538928-0604812?v=glance&n=507846
Available at the UK amazon site.
Have a look at William Sichel's website
www.williamsichel.co.uk
He's got some pages which answer ultra related questions.