• Written by best-selling Portugese author Regina Gonçalves.
　　• Best fiction titles for learning in Europe.
　　• Korean, Spanish, French, English and Simplied Chinese rights are sold.
　　• Selected as text books by Brazilian Ministry of Education, famous private schools and the Instituto Nacional de Matemtica Pura Aplicada.
　　• About one million copies are sold.　
　　• A historical fiction series dedicated to young readers and adults. It is packed with mystery and suspense stories that combine and integrate a wide range of fields of knowledge, such as History, Art, Philosophy and Science.
　　• English samples are available.

　　12 titles in this series: Mathematics–What beast is this?, Ramses II and the Battle of Kadesh, Napoleon Bonaparte in Russia, Alexander and Aristotle, The Phantom of the Opera Carmen, Einstein, Picasso, Agatha and Chaplin, Hannibal and Archimedes, Santos Dumont - Flying is for everyone, The Emperor and the Journalist, Tutankhamun,Marco Polo's Travels, The angel of the great depression

one more title in the second semester of 2023- "Enigma Machine in the Battle of the Atlantic"- is an adventure of Caius Zip during the second world war, with battle between a submarine and a destroyer warship, the search for the encoding/decoding machine called Enigma, the first electronic computer in Bletchey Park, dialogues with the math genius Alan Turing, Espionage and more...

　　Caius Zip, the young time traveller, witnesses the invasion of the French army under the command of the legendary Napoleon, in the city of Moscow.
　　Caius accidentally saves Napoleon from a attempt against his life, and later meets princess Natasha and her son Ivan. Caius Zip attends a dinner during which there is a memorable dialogue between Napoleon, with his determined and compelling personality, his faithful marshal Ney and, on the Russian side, the patriotic princess, Natasha.
　　Over dinner, Caius listens, captivated, to the stories told by Napoleon himself, on his strategies and achievements up to the moment of the invasion of Moscow. After crossing a vast forest with Ivan, Caius meets the prudent Russian commander-in-chief Kutuzov, who retreats and makes things more difficult for the invaders by cutting their supply lines and striking continuously with guerrilla tactics until the arrival of his greatest ally: general winter. Kutuzov has his reasons for refusing frontal combat with Napoleon. The information provided by his spies combined with simple calculations that armed him with the confidence he needed to resist the pressure of those who wanted definitive combat, forcing the Russian army to risk total devastation.
　　Caius learns a valuable lesson on strategy and a notable human virtue with the Russian marshal: patience!
　　At the end, the book includes a highly original biography in the form of imaginary memories of Napoleon.

Regina Gonçalves
　　Regina has a degree in mathematics and systems analysis but decided not to pursue her profession in order to dedicate her time to teaching her daughters and other adolescents. She wrote textbooks with stories that combined the study of history with mathematics.
　　As these stories expanded, Regina found herself dedicating more and more of her time to writing and eventually completed a series of books about the young “Caius Zip – The Time Traveller,” for young readers and adults who are still young at heart.
　　Her works of fiction always aim at providing information and arousing the reader’s curiosity concerning matters of world history, art, philosophy and science. Mathematics has always been present in the solution of enigmas, and decision making in epic battles and during the investigation of a mystery.