Dover Math Games and Puzzles Ser.: What Is the Name of This Book? : The Riddle of Dracula and Other Logical Puzzles by Raymond Smullyan (2011, Trade Paperback)
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The most original most profound and most humorous collection of recreational logic and math problems ever written. Martin Gardner. This book is unused unread and in perfect condition. 📚 Book Details.
It forces you to think clearly and logically. And even then, you cannot always find the right solution. Particularly thought provoking are the slight changes in the premises that lead too a fully different solution.