good luck, just getting around the marathon is 99 percent mental, it will be painful, but an averagely fit person can do it with limited training, goal setting is where it gets interesting.
If 9 weeks is it, just run as much as possible, it takes about 4 weeks for the body to recognise the effects of training, so essentially he only has 5 weeks of training.
Good luck. ( I am a former 2:39 marathon runner and former RAF x country champion so do have some experience 🙂 ) Just saying as this being STW I know someone will know better and tell me Im talking poo 🙂
EDIT – and only 5ft 7, and naturally a fat bastard so had to work and train hard to achieve what I did!
The above book will be a useful reference guide, if he gets the bug, and wants to do more running in the future.