Added structure overview to About this book.

EnterprisePharo.tex

@@ -109,16 +109,43 @@
 
 \chapter*{About this book}
 
-\emph{Enterprise Pharo} is the third volume of the series, following \emph{Pharo
-  by Example} and \emph{Deep into Pharo}. It covers libraries and frameworks for
-enterprises, and in particular those doing web development.
+\emph{Enterprise Pharo} is the third volume of the series, following
+\emph{Pharo by Example} and \emph{Deep into Pharo}. It covers
+enterprise libraries and frameworks, and in particular those useful for
+doing web development.
+
+The book is structured in five parts.\\
+\textbf{The first part} talks about simple web applications, starting with a
+minimal web application in chapter 1 on Teapot and then a
+tutorial on building a more complete web application in chapter 2.\\
+\textbf{Part two of the book} deals with HTTP support in Pharo, talking about
+character encoding in chapter 3, using Pharo as a HTTP Client in
+chapter 4, as a HTTP server in chapter 5, and using WebSockets in chapter 6.\\
+\textbf{In the third part} we discuss the handling of data for the
+application. Firstly we treat data that is in the form of
+comma-separated values in chapter 7. Secondly and thirdly, we treat
+JSON (in chapter 8) and its Smalltalk counterpart STON (in chapter
+9). Fourthly, serialization and deserialization of object graphs with
+Fuel is treated in chapter 10. Lastly, we discuss the Voyage
+persistence framework and persisting to MongoDB databases in
+chapter 11.\\
+\textbf{Part four of the book} deals with the presentation layer. Chapter 12
+shows how to use Mustache templates in Pharo, and chapter 13 talks
+about programmatic generation of CSS files. The documentation of the
+application could be written in Pillar, which is presented in chapter
+14. How to generate .pdf files from the application with Artefact is
+shown in chapter 15.\\
+\textbf{The fifth part of the book} deals with deploying the web
+application. This is explained in chapter 16 that talks not only about how to build and
+run the application, but also other important topics like monitoring
+the app. 
 
 \paragraph{This book is a collective work}
 The editors have curated and reformatted the following chapters from blog posts
 and tutorials written by many people. Here is the complete list of contributors
 to the book, in alphabetical order:
 
-\begin{multicols}{2}
+\begin{multicols}{3}
 Olivier Auverlot\\
 Damien Cassou\\
 Gabriel Cotelli\\