Head First WordPress

For my students now I use Head First WordPress, but there is some mistakes in the book, as you surely already know..! I want to use the book in the future too, so I will like to ask:
1) Will there soon be a new book without mistakes?
2) If I buy the book as ebook, will this then be without the mistakes?
Soon in beginning of November I have a new class of students, and I need a book without mistakes..!
Sincerely Yours
Per Rasmussen
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