Not so sure what to think about it. The book is great, well made and we learn new stuff, especially if you know little about classical music. Everything is okay with the book itself.

What's bother me is the look-a-like with the 30 seconds books collections (which I love a lot). It's exactly the same. So I'm not sure if the collection just put on some new look and new brand or if it some kind of copy they make. If it's a new look I'm of course alright with it, but if it's a copy of the collection it's just not right and not something you should be allow to do.

I didn't find answer to my question so if you have please feel free to comment and share your wisdom with me and if know just be careful.