I have this book "The New Competitive Runner's Handbook" by Bob Glover and Pete Schuder, from what looks like 1988. It has some good training and racing schedules in there and I am wondering if the training techniques are outdated or if the information is still relative,
The information in the book is still relevant (not "relative"), and the book is very broad, in that it covers everything from tempo runs to dealing with cold weather.
However, the training schedules (at least in the new edition) are a bit on the soft side. Maybe the older edition is better, but the new edition appears almost lawsuit-conscious or over-edited or something -- it's Bob coming through faintly through a filter of politically correct editing. The real Bob (who average Joe calls a "psychotic asshole") is muffled out. I run for Bob's team in New York, and many of the runners on his team go outside the milage he recommends in that book, and do speed work more than once a week (most of the schedules only have one speed workout a week). Many of the runners on his team either go to both his speed workouts, or do one with the training group, and one on their own.
For a serious training schedule, I'd suggest you take a look at the Daniels book. The Daniels approach -- a periodised long term approach, is the way to go if you have the patience and discipline to pursue it. Bob's point of view does make sense -- he argues that most runners aren't willing to commit to a long term schedule, so his short 12 week schedules, as he admits in the book are a pragmatic compromise, rather than an ideal training program.