Super System is old, but I wouldn't call it outdated. Definitely still worth a read. The more books you've read, the bigger your tool set. The key here is that it works in both directions because each style you learn, is a style you may recognize other players using. The pitfall of Super System, is by now, everyone's read it, and it's quite easily recognized:

- limp-shoving under the gun

- always trying to go on runs

- over playing suited connectors (JTs specifically)

But, you still get the advantage of being able to recognize it. There's lots of good wisdom in there that isn't as prescriptive either. Read as many books as you can. Poker is information warfare.