So this is the first poker book I ever bought, and I quickly realized I got the wrong one and set it aside. I'm curious as to how useful the info in this book is at varying levels. It seems that some of the advanced play is completely useless at lower limits, where straightfoward donk-beating strategies work best.

So for those who have read this book and know. At what limits do the more advanced plays discussed in this book start to become useful? And am I right in assuming that most advanced plays are useless or even detrimental to use at lower limits?