The Art of SEO 2nd edition vs 3rd edition

The Art of SEO 3rd edition (by Eric, Enge, Stephan Spencer), compared to the 2nd edition (by Stephan Spencer / Rand Jessie), adds Chapter 9 and Chapter 1, 2, 3, 6, 7, 8, 10 and 15 as follows:

Chapter 1 Search: Reflecting Consciousness and Connecting Commerce

The Mobile Shift

Chapter 2 Search Engine Basics

The Knowledge Graph

Chapter 3 SEO Planning: Customizing Your Strategy

Advanced Methods for Planning and Evaluation

Chapter 6 Developing an SEO-Friendly Website

Mobile Friendliness
Semantic Search
Schema. org
Google Authorship and Author Authority
Google’s Knowledge Graph and the Knowledge Vault

Chapter 7 Content Marketing

Building an Audience
Relationships and Outreach
Other Ways to Earn Links
Chapter 8 How Social Media and User Data Play a Role in Search Results and Rankings

Correlation Between Social Signals and Google Rankings
Does Google Use Facebook as a Ranking Signal?
Does Google Use Twitter as a Ranking Signal?
Does Google Use Google+ as a Ranking Signal?

Chapter 9 Panda, Penguin, and Penalties

Diagnosing the Cause of a Traffic Loss
Summary of Major Google Algorithms
Panda
Penguin
Penalties
Conclusion

Chapter 10 Mobile, Local, and Vertical SEO

The Mobile Landscape
App SEO: Deep Linking and Indexing for Mobile Search
Optimizing for Blog Search

Chapter 15 An Evolving Art Form: The Future of SEO

The Future of Semantic Search and the Knowledge Graph

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