2.18 Class File
The class file (.cls) defines the page layout, heading
styles and various commands and environments needed for a
particular type of document. The class file is specified using the
command
where <class-name> is the name of the file without the .cls extension. All LaTeX documents must start with this command. This book uses the scrbook class.
This book is also available as A4 PDF or 12.8cm x 9.6cm PDF or paperback (ISBN 978-1-909440-00-5).