I have been using on and off a version of Soccer Training: Drills and fitness practices (although I am using the 6th edition from 1999).
It is a good straight-forward coaching manual by some of the best coaches in the country – Malcolm Cook is renowned for his youth coaching.
I help to run a football club for 35 youngsters aged 7-11 with quite a wide ability range. We have used some of the drills to good effect, some of the other drills are a bit too complex for youth coaching. It is a good resource for those involved in regular coaching.