The book is all about Lazarus and FPC necessities. Whenever it might be useful there will be created special demo apps that you will get together wit the book. It is an ongoing process so little changes have to be expected...
The PDF file will become personalized.That will take some time. Usually we are able to handle that within a few hours.
Date updated: 4/7/2021
A new preview of the final PDF is you can see here. (chapter mainpages)