I will ask forgiveness for the author of the book and readers of a forum in advance. I will only express the opinion.
I will do the same
I haven't understood about what it is written in this book and for what age audience it is intended.
You might want to actually read the book (instead of a quick-scan, if you did that at all), as the target audience is listed. The writer is very clear about that.
I have no idea what age has to do with anything.... old enough to be able to read letters, understand words, sentences and paragraphs ?
If the book about the principles of programming, then what relation it has to Lazarus?
Also listed in the actual contents of the book.
If the book about the Pascal language, then where the description of basic types and designs of language?
The author chooses to use another approach. For good reason as the market is thin. I can read the official definition inside FPC manuals for a description of basic types.
You clearly haven't read the book. Read it to figure out if certain topics are mentioned at all.
If the book about the Lazarus installation and a configuration of IDE, then isn't present anything interesting, except elementary skills of installation there?
Sure, the content of the book is only about installing Lazarus and configuring the IDE. Nothing to see there. Please move on.
imho, from the book I haven't seen practical benefits yet.
Perhaps not for you, but i do suspect it does for those readers that are targetted by the author.
@Thaddy:
Thanks for mentioning. You did before if i remember correctly but there has been some nice progress.
It's always a delight to read Jeff's books. I would certainly recommend reading it, especially when fitting the target audience.