Learning Books
I want to read a book similar to "Stumping You Without Negotiation: A Complete Collection of the Coldest and Unpopular Knowledge". There is no requirement for books. They can be liberal arts books, science books, computer science books, or books on a certain subject, including miscellaneous professional books.
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This book is really good! The content is rich, with various types of Sudoku questions, and the difficulty is gradually increased, making it very friendly to beginners. I especially like Diagonal Sudoku and Killer Sudoku, they are very challenging. Just like life, sometimes you have to face various difficulties, but as long as you persist, you will gain something. This book is compact and portable, suitable for taking out and practicing anytime and anywhere. It can also exercise your brain! Recommended to friends who are interested in Sudoku~