Mastering Middle games book.


There's a YouTube review of that book which might help you make up your mind:
https://www.youtube.com/watch?v=k_SSqIquT7w

I believe MCM to be too advanced for an Elo 1300 player. Lots of moves with a minimum of commentary or explanation for why the moves are being made. However you can use Amazon's 'Look Inside' feature here to get a sense of whether the book is useful or too advanced for you...
Mastering Chess Middlegames: Lectures from the All-Russian School of Grandmasters by Alexander Panchenko
https://www.amazon.com/Mastering-Chess-Middlegames-All-Russian-Grandmasters/dp/9056916092/ref=sr_1_1?crid=1AIFXXH9XWW4U&keywords=mastering+chess+middlegames&qid=1644682636&s=books&sprefix=mastering+chess+mi%2Cstripbooks%2C134&sr=1-1&asin=9056916092&revisionId=&format=4&depth=1
Otherwise you might consider some of the suggestions here...
Good Positional Chess, Planning & Strategy Books for Beginners and Beyond...
https://www.chess.com/blog/RussBell/introduction-to-positional-chess-planning-strategy
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