I recommend Winning Chess Tactics and Winning Chess Strategies by GM Seirawan.
Best Books For Strategies and/or Tactics For Beginners?

Simple Chess is a good book to get started. And I would recommend studying the Classical Games. Tal's book on the 1960 World Chess Championship is probably the greatest chess book ever written.
Simple Chess by who? Michael Stean?

Good Positional Chess, Planning & Strategy Books for Beginners and Beyond...
https://www.chess.com/blog/RussBell/introduction-to-positional-chess-planning-strategy
Good Chess Books for Beginners and Beyond...
https://www.chess.com/blog/RussBell/good-chess-books-for-beginners-and-beyond


My favorite is Cognitive Chess
I usually meant for higher rated people, but if you set the positions up on a physical board it becomes much easier.
It uses a series of daily tasks to drastically improve calculation skills.
Hope this helps!
Which books would you recommend for beginners when it comes to improving strategies and tactics?