How does Panchenko`s middlegame book rank?

I am considering buying Alekasnder Panchenko's book, Mastering chess Middlegames.

How does it compare to other  books on this subject matter and what sort of rating range is it aimed at?

I have a copy of the book in PDF but I have not read much into the book. I suffer from Severe ADHD so my concentration is rather poor for reading much for content. 
It also affects my ability to play chess. This is why I only play unrated anymore. I do not need any more stress than necessary when I play.

https://www.chessable.com/mastering-chess-middlegames/course/24313/

I haven’t studied the book, but here is a detailed description, and 6 minute free video regarding the course.

Alexander Kotov - Isaak Boleslavsky, Moscow 1945 

With his next move, Black begins counterplay in the centre and on the kingside.

Evidently, better is2.exd5xd53.c43.dxe5e34.c4xc45.xc4xe56.e2b4+7.d1O-O, and the white king is not very comfortable3...xd44.xd4exd45.O-O-OO-O6.xd47f6.

After3...d7?4.xd7+exd75.exd5White has a normal position.

Black has fully adequate compensation for the pawn.

Now White loses quickly.7.f1 was essential.

Effectively developing the attack.

He is not saved by8.f4xg29.fxe5xe510.f1xf111.xf1f5+12.g2f2+13.h3d614.h1d7+15.g3e4+, and Black wins.

Or9.c3e3!10.d310.d3xg2+10...c811.c4xc412.xc4g413.d4e1+14.xe1d2+15.e2xc4.

White resigned. 0-1

Thanks for all the comments. For budgetary reasons I opted to buy it on forward chess (I can be a sucker for a 30% discount!). It does look good, but obviously will require time, commitment and patience.