By the time a book goes to print it's outdated. Stuff on the internet is general at best.
PPC results vary dramatically and involve different methods depending on numerous factors such as: keywords, competition, niche, etc.
Honestly the best way to learn is to loose a little money and learn through trial and error. A/B testing will definitely help you find the best value.
Otherwise hire the pros...
newviewit.com
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One recommendation is to learn and master tracking202
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