This book is written in typical Brad Callen fashion promoting his Keyword Elite product. But I must add that Brad is also one of the authors that actually does know what he is saying. This read is worth the while.

I agree with dsd start reading on page 10. If you are very new to Adwords also read the 5 reasons on page 8. It gives you direction throughout the book.
On page 22 he promotes Keyword Elite. There are better tools available imo and they are free. You can start by using the following,


One of the secrets of adwords is to get into keywords with low cost click through rates that are related to your keywords you are advertising by also advertising with adsense. This is meant for more advanced users that are battling with natural ranking.
http://www.dictionary.com/
and the important one is Thesaurus
The concept is simple. You advertise in related keywords and get clicks on your adwords for the more expensive keywords. It can be tricky though for newbies.