What Book Should I Buy as a 12 year Old?

Here are some reading possibilities that I often mention:

Simple Attacking Plans by Fred Wilson (2012)

https://web.archive.org/web/20140708090402/http://www.chesscafe.com/text/review874.pdf

http://dev.jeremysilman.com/shop/pc/Simple-Attacking-Plans-77p3731.htm

Logical Chess: Move by Move by Irving Chernev (1957)

https://web.archive.org/web/20140708104437/http://www.chesscafe.com/text/logichess.pdf

The Most Instructive Games of Chess Ever Played by Irving Chernev (1965)

https://chessbookreviews.wordpress.com/tag/most-instructive-games-of-chess-ever-played/

Winning Chess by Irving Chernev and Fred Reinfeld (1948)

https://web.archive.org/web/20140708093415/http://www.chesscafe.com/text/review919.pdf

Back to Basics: Tactics by Dan Heisman (2007)

https://web.archive.org/web/20140708233537/http://www.chesscafe.com/text/review585.pdf

https://www.chess.com/article/view/book-review-back-to-basics-tactics

Discovering Chess Openings by GM John Emms (2006)

https://web.archive.org/web/20140627114655/http://www.chesscafe.com/text/hansen91.pdf

Openings for Amateurs by Pete Tamburro (2014)

http://kenilworthian.blogspot.com/2014/05/review-of-pete-tamburros-openings-for.html

https://chessbookreviews.wordpress.com/tag/openings-for-amateurs/

https://www.mongoosepress.com/catalog/excerpts/openings_amateurs.pdf

Chess Endgames for Kids by Karsten Müller (2015)

https://chessbookreviews.wordpress.com/tag/chess-endgames-for-kids/

http://www.gambitbooks.com/pdfs/Chess_Endgames_for_Kids.pdf

A Guide to Chess Improvement by Dan Heisman (2010)

https://web.archive.org/web/20140708105628/http://www.chesscafe.com/text/review781.pdf

Studying Chess Made Easy by Andrew Soltis (2009)

https://web.archive.org/web/20140708090448/http://www.chesscafe.com/text/review750.pdf

Seirawan stuff:

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 suggest Winning Chess Strategy for Kids by Coakley. This book contains the necessary endgames,middle games,tactics and opening knowledge the you must know. This book also contains exercises. It is also an enjoyable book to study. This book will improve your game.

https://www.amazon.com/Winning-Chess-Strategy-Kids-Coakley/dp/1895525055

https://web.archive.org/web/20140708094112/http://www.chesscafe.com/text/review332.pdf