By themselves, books don’t mean anything.  They’re code marks on paper.

In order to “run” a book-slash-program, a reader has to read it.  Hardware for the software.

You can’t predict what the hardware is going to do to the software with 100% accuracy.  Sometimes it won’t run.  Sometimes it runs a mysterious program that you never coded for.

Write all you want.

The interesting part is the reader.