• 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, appears in Ancient Egypt and learns geometry with the great pharaoh Ramses II, his lovely wife Nefertari, an Egyptian architect and a Greek philosopher.
　　During this learning experience, Caius matures and realizes that one of the most valuable treasures of the Egyptian civilization was Mathematics. Caius is shocked to discover that the Egyptians considered Mathematics essential in their daily lives, to build monuments and buildings, to prepare the field for sowing, and during battles to organize the troops and prepare traps. In this way, Mathematics is a living, dynamic science created by men according to their social needs that can be learned without causing panic or fear.
　　In the battle of Kadesh, Caius helps Ramses to build traps against the Hittite army based on calculations of area and volume. These chapters fully integrate the disciplines of Mathematics and History, and even a little Philosophy, into the wisdom of ancient Egypt that enables Caius to mature. The end of the book contains a very original biography in the form of imaginary memories of the pharaoh, and there is also a section of photographs and interesting information on Ancient Egypt.

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.