I own the book. It is written for the beginner-novice audience and continues to be a very good book for learning fundamental principles of chess play, particularly for those just starting their journey in chess. Most anything in the book that is concerned with fundamentals and principles, which is the focus of the majority of the book, is worthwhile. One caveat however, is that since it was written in 1935, opening theory (i.e., very specific lines) has evolved since then, particularly so for the Queen's Pawn openings. The point being that while the book's presentation of opening fundamentals is generally still valid (principles tend to less subject to change and/or fashion), specific openings variations (lines) in some cases may be outdated, so should be checked against current theory. Bottom line - it is still a great book for learning the fundamental principles of good chess play, and is very well written.
Note that the book is available in both a "Descriptive" notation and also an "Algebraic" notation edition...
Descriptive notation...
https://www.amazon.com/Game-Chess-Dover-ebook/dp/B00A739RW2/ref=sr_1_2?dchild=1&keywords=the+game+of+chess+tarrasch&qid=1585864365&s=books&sr=1-2
Algebraic notation...
https://www.amazon.com/Game-Chess-Algebraic-Siegbert-Tarrasch/dp/1880673940/ref=sr_1_8?dchild=1&keywords=the+game+of+chess+tarrasch&qid=1585864493&s=books&sr=1-8
For more instructive chess book suggestions, check out...
Good Chess Books for Beginners and Beyond...
https://www.chess.com/blog/RussBell/good-chess-books-for-beginners-and-beyond
I just bought this book. Has anyone read it? I'm not so much of a true beginner (as in I know some openings -although I haven't delved very deep in variations-, know the basics of tactics and the elements of positional play, and before learning all of this, I've played for years, but never "seriously"), but I was hoping to know what the consensus is on this book for learning, and if I should complement it with some more modern books.