Thanks. In brief, the previous one is for administrators, business users; the current one is for Java developers.
Liferay Portal Enterprise Intranets A practical guide to building a complete corporate intranet with Liferay
This book is a complete guide to building an intranet with Liferay (version 4.4 and 5.0)—assess your needs, install the software, start using it, deploy portlets, customize it per your requirements, and train users. The book focuses on leveraging the Liferay framework by configuring the XML files, without changing the underlying Java code. Each chapter gives practical guidance on how to install, use, and customize Liferay. There are many step-by-step examples for better understanding.
This book is a practical guide with a very user-friendly approach. The author has taken a virtual enterprise as an example and has used the features of Liferay to build a corporate intranet for that enterprise.
This book is for System Administrators or experienced users (not necessarily programmers) who want to install and use Liferay in their teams or businesses without dealing with complex code. Pre-knowledge of Liferay is not expected for this book.
Liferay Portal 5.2 Systems Development
A Java developer's guide to developing custom intranet systems, based on Liferay's platform
This book focuses on teaching by example. Every chapter provides an overview, and then dives right into hands-on examples so you can see and play with the solution in your own environment. All code samples run on both the latest Enterprise and Community releases.
This book will be most useful to professional Java developers who want to build custom web sites, portals, and highly customized intranet applications using Liferay portal as a framework.
This book is for Java developers, and you will get most from the book if you already work with Java but you need not have prior experience on Liferay portal. Although Liferay portal makes heavy use of open source frameworks such as Spring, Hibernate, Struts, and Lucene, no prior experience using these is assumed.