Very uneven Content

If this 100-page guide must necessarily be concise, it has very big gaps: only the internal insulation is covered (which does not leave as hear the title of the book), without a word on systems open (eg. windows) but with a whole chapter on the noise! In addition, the drawn diagrams are ugly and often incomprehensible. Besides, some insulation methods are described for a novice too (but not enough for a lay reader), while the relevant technical reminders are forgotten. This makes the uneven quality and, ultimately, the book provides little, even when taking into account the rather low price. Disappointing from an author who is capable of much better.