What book are you talking about?
If it's this recent "Learn to Program 2D Games in Blitz Basic" it's NOT for Amiga version of Blitz Basic. It's written for PC version whch have evolved a LOT sinceoriginal Blitz author Mark Silby moved on PC coding. Amiga version is many years old and there have been only minimal bug-fixes to it, so it's not compatible with that book.
I'm sure that book is good for ideas, but it can't be directly used with Amiga version.
