"Programming Windows" exposed the simplicity behind the Windows architecture. If you had even a smattering of C experience, Petzold could get you writing Windows applications the same day you opened his book. He triggered an explosion of software development. There are excellent books for novice Linux programmers, but unfortunately, nothing compared to Petzold's clear and direct presentation. .
And in the end it turned out that it’s not worth programming windows any more. Just use Qt, Java or the awful web technology of the day and you’ll probably be better off than with whatever MS is recommending.