History of maths

Have you ever think about world before teorem of Tales?
Can you imagine your calculation without "zero"?
Do you know that if you are under 21 you still can became a great mathematics?
How much do you know about Carl Friedrich Gauss, a man called a prince of mathematics?
How many digits of the number pi (symbol: π) can you recite without breath?
Have you heard about constant e, which "father" was Euler?

If you want read about it, I recommend you a Denis Guedj's book The Parrot's Theorem.
A Parisian bookseller (Mr. Ruche), receives a bequest from a long lost friend in the Amazon of a vast library of maths books, which propels him into a great exploration of the story of mathematics. He is reading about maths in chronological order and a reader can learn history of maths with him. At the same time you are invited to solve the murder mystery along with the main characters.

Brazil in German way

So long I haven't written... and so many books I had read in that time. Today one of the latest read book.
More then three years ago I met nice man from Brazil. And than I have been trying find a book about Brazil. It was very difficult, everything what I found was about nature or about Indians of South America.
Finally I've got a one about emigration of Germans in 19th century - "Dziewczyna znad Rio Paraiso"

They know almost nothing about Brazil environment and animals, but they dream and believe in wonderful future in that far far away land. But not everything went as they wish...
(german: Das Maeschen am Rio Paraiso). The author (Ana Veloso) tells a story parallel in two point of time. At the beginning, in 1826 we met a young woman, who suffer from amnesia and then we learn what had happened in the past. The second point of time is in 1810, when the main character is 7 years old girl. She is German and has grown up in German village in Hunsrueck as a 8th child of her parents. When she was about 20 years old she went with her fiance to Brazil to Sao Leopoldo, because a government of Brazil gave fields to all immigrants and helped them at the beginning.
Of course it is only an imagination story, however I learn a little about Brazil history.