Working through chess books

I have over 115 chess books, but haven't worked through that many yet. Should I work through several at once or just one at a time?

One at a time, but if a book is uninteresting, move to another.

Learning new things often involves using a variety of resources. For example, in school, you might use several different textbooks for one subject, as one book may explain a topic better than another. Reading about the same subject from multiple sources can provide a deeper understanding, as each source may offer a different perspective. A good teacher knows how to adapt to their students' unique needs. Some students learn by doing, some learn by watching videos, and others need a quiet environment. Having many books isn't as important as having high-quality resources. The quality of your learning materials makes a long-term difference.

115? Wow, that seems extreme. You could open a chess library with that collection!

I have 9 and haven't finished any of them:

Winning Chess Openings, Fred Reinfeld, 1973.
How to Improve Your Chess, Ira Horowitz & Fred Reinfeld, 1952
Zurich International Chess Tournament 1953, David Bronstein, 1979.
Mein System, Aron Nimzowitsch, 1965.
Silman's Complete Endgame Course, Jeremy Silman, 2007.
How to Reassess Your Chess, Jeremy Silman, 1993.
Dvoretsky's Endgame Manual, Mark Dvoretsky, 2003.
Sharpen Your Chess Tactics in 7 Days, Gary Lane, 2009.
Ausgewähle Schachpartien, Vasily Smylsov, 1954.

I mostly completed How to Improve Your Chess, finished about half the openings in Winning Chess Openings, and got thru about 100 page of Silman's Endgame Manual, played thru and read Bronstein's notes for about a dozen games, and scratched the surface of the rest.

I think the best approach is to pick a book on a topic you feel that you need to improve on because its holding you back, and stick with that book for a while. If its a good book for you in terms of level and style, then stay with it (don't let yourself be distracted by other books) until you feel like you progressed in the area you wanted to address. If you realize the book isn't working for you because you don't like the style, then give it to someone else and try another book. If its too advanced, then set it aside. You might find it to be a good fit when you have progressed.

I find Silman's Endgame Manual to be quite good for improving endgame knowledge. Its written in an entertaining, accessible style and its arranged in an order of increasing skill level. That way, you can learn the things needed at your level of play, and then apply them in your games. Once you progress to understanding those ideas in practical terms, you can return to the Manual to learn the next topic you need in order to improve at endgames. It ranges from 1000 all the way to 2400, and includes a bunch of interesting positions from Endgames of Masters as well. To me, that is an example of a keeper book, that i will return to again and again.

"I have over 115 chess books" * That is excess.
Make a selection and donate the other.
Here are 20 books from somebody who actually made grandmaster with them.
https://rafaelleitao.com/chess-books-grandmaster/
Taking into account it takes like 7 years to become a grandmaster, that leads to 3 books per year, or 4 months per book.

"Should I work through several at once or just one at a time?" * One at a time. And after some time come back to one.

"I have 9 and haven't finished any of them:
Winning Chess Openings, Fred Reinfeld, 1973.
How to Improve Your Chess, Ira Horowitz & Fred Reinfeld, 1952
Zurich International Chess Tournament 1953, David Bronstein, 1979.
Mein System, Aron Nimzowitsch, 1965.
Silman's Complete Endgame Course, Jeremy Silman, 2007.
How to Reassess Your Chess, Jeremy Silman, 1993.
Dvoretsky's Endgame Manual, Mark Dvoretsky, 2003.
Sharpen Your Chess Tactics in 7 Days, Gary Lane, 2009.
Ausgewähle Schachpartien, Vasily Smylsov, 1954."

Of these I would prioritize:
Zurich International Chess Tournament 1953, David Bronstein, 1979.
Mein System, Aron Nimzowitsch, 1965.
Dvoretsky's Endgame Manual, Mark Dvoretsky, 2003.

"... This book is the first volume in a series of manuals designed for players who are building the foundations of their chess knowledge. The reader will receive the necessary basic knowledge in six areas of the game - tactics, positional play, strategy, the calculation of variations, the opening and the endgame. ... To make the book entertaining and varied, I have mixed up these different areas, ..." - GM Artur Yusupov
https://www.qualitychess.co.uk/ebooks/Revision&Exam1-excerpt.pdf
I mention this quote because I was struck by the casual attitude toward study-subject order: switch from one subject to another for the sake of entertainment and variety.

I have hundreds of chess books. Of course, I've also managed to read quite a few of them (115 is only a lot if you're not actually reading any of them).

@CaptainHugbard said in #1:

I have over 115 chess books, but haven't worked through that many yet. Should I work through several at once or just one at a time?

How did you come in possession of such a large volume? ;)

@Thymeflies: 15 are real books. Rest PDFs. Yeah I am crazy about books... :)
But not only collecting... Now I want to work with them.

@CaptainHugbard said in #9:

15 are real books. Rest PDFs.
Majority of my chess books are e-books. I don't think it makes them less real than those I have in paper form.