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Differentiated book- It has a historical context with research of the time-The purpose of realizing this historical context is to approach the understanding of a historical epoch from the elements provided by the text. Hence the importance of placing the document in context. It is necessary to unravel what its author or authors have said, how it has been said, when, why and where, always relating it to its historical moment.Henry Ernest Dudeney (April 10, 1857 - April 23, 1930) was an English author and mathematician specializing in logical puzzles and mathematical games. He is known as one of the country's leading mathematical puzzle creators.Dudeney was born in the town of Mayfield, East Sussex, England, one of the six children of Gilbert and Lucy Dudeney. His grandfather, John Dudeney, was known as a self-taught mathematician and pastor; His initiative was greatly admired by his grandson. Dudeney learned to play chess at an early age, and continued to play frequently throughout his life. This led to a marked interest in mathematics and puzzle composition. Chess problems in particular fascinated him during his early years.Although Dudeney spent his career in the Civil Service, he continued to brainstorm various problems and puzzles. Dudeney's first contributions were newspaper and magazine appearances, often under the pseudonym "Sphinx." Much of this previous work was a collaboration with the American puzzle Sam Loyd; in 1890, they published a series of articles in the weekly English penny Tit-Bits.