get winning chess strategy for kids by coackley.
I need a book...
It might be of interest to look at A COMPLETE CHESS COURSE by Antonio Gude.
http://www.gambitbooks.com/pdfs/A_Complete_Chess_Course.pdf
I think that a variety of topics are discussed.

Another good book to start with is The Complete Idiot's Guide to Chess by Patrick Wolff.
This covers a large amount of material from opening principles to tactics and strategy, well explained.
https://chessbookreviews.wordpress.com/2015/06/04/the-soviet-chess-primer/
"... The title might suggest it is for beginners, but that is not the case. [The Soviet Chess Primer] does start off with some basic positions, but quickly moves on to much more advanced material including chapters on positional play and techniques of calculation." - IM John Donaldson
https://www.qualitychess.co.uk/ebooks/Soviet_Chess_Primer-extract.pdf
... Now, if you want a bit more thorough, you can go with a book series. Seirawan's Winning Chess series ...
http://seagaard.dk/review/eng/bo_beginner/ev_winning_chess.asp?KATID=BO&ID=BO-Beginner
http://www.nystar.com/tamarkin/review1.htm
https://web.archive.org/web/20140627132508/http://www.chesscafe.com/text/hansen173.pdf
https://www.chess.com/article/view/book-review-winning-chess-endings
https://web.archive.org/web/20140708092617/http://www.chesscafe.com/text/review560.pdf

I agree. The English is old fashioned but good. Nimzowitsch's My System is a good one to keep in mind if you ever decide to get a second one but Dr. Lasker's book is my suggestion.
I will agree that Tarrasch book is by far the best complete cook for beginners.
The only drawback , you need to work with it. If you love chess that is actually a huge advantage.
Published about 8 or 9 decades ago.
... For a beginner, playing the opening as well as Tarrasch, Steinitz, Chigorin, Lasker, Capablanca, etc. would be a massive accomplishment.
Something that would necessarily be accomplished by reading a book from more than 80 years ago? Are there perhaps easier goals that would be more suitable for a modern beginner?

Good Chess Books for Beginners and Beyond....
https://www.chess.com/blog/RussBell/good-chess-books-for-beginners-and-beyond

My current blitz ranking is 725 and I’m looking to get a book, but I only want to get one. Does anyone know any book that covers everything from openings to checkmates for someone my level?
If it's your Blitz play specifically that you want to improve, then a chess book aimed at general improvement might not be your best bet.
Best might be to isolate the skills that Blitz demands (eg: tactical alertness, a quick grasp of shifting opportunities, the ability to watch the whole board instead of getting fixated on one part of it, etc) and start working on those particular skills.
Naturally an across-the-board improvement in all chess skills will help your Blitz, too.
... Saying the opening coverage is a bit dated would only matter once they are approaching ~1800-2000 where some players may have studied enough to take advantage of any mild inaccuracies the old masters played. ...
What about lines that occurred little or not at all, 80 or more years ago?
My current blitz ranking is 725 and I’m looking to get a book, but I only want to get one. Does anyone know any book that covers everything from openings to checkmates for someone my level?