Your book probably refers to a template file developed by the author.
Please give your version of AC, platform, and title/author of the book.
There is a free getting started book by David Nicholson-Cole called Object Making with ArchiCAD, available as a PDF - but I cannot seem to find the link ...maybe someone else can post it?
Karl
One of the forum moderators
AC 28 USA and earlier • macOS Sonoma 14.7.1, MacBook Pro M2 Max 12CPU/30GPU cores, 32GB