This book is more like an almanac/reference. I found it very helpful - but i already know JS and python - but it felt like they touch on concepts very briefly so if someone was using this as their first programming book they mightve found it a bit of a challenging starting point.
Also it dedicates an equal amount of pages to all the concepts, which means the harder concepts are under-explained. Most importantly memory manipulation, which is probably the most critical part of C, isnt really explained in depth either.