B.1 * (No message, just an asterisk prompt!)
You've gone into TeX! This is probably because
you've forgotten the \end{document}. The asterisk is the
TeX prompt. At this point the best thing to do is to abort the
TeX run.
This book is also available as A4 PDF or 12.8cm x 9.6cm PDF or paperback (ISBN 978-1-909440-00-5).