The 4th book in the series The Time Explorers

The impossible was about to happen again. Most scientists said that TIME TRAVEL was impossible. The more daring thought that, theoretically, it might be possible to create a rift in the fabric of TIME-SPACE to catch a glimpse of some other moment in history. However, everyone absolutely agreed that never, ever, not even once would it be feasible for someone to visit another era. And yet…!

Professor Smartson leads the most important scientific project in history! Cristina, Victor, Miguel, Ibys, and Kali – the ornithosaurus – will travel back in time to gather items from the most exciting ancient civilizations. But the villain Malefico Durador, the Professor's sworn enemy, will turn every mission into a… very dangerous adventure!

Come on, with a watch you will also travel to the past…

The Time Explorers will travel to the Inca Empire during the Inti Raymi festival in 1487. This time they have a seemingly simple mission: to obtain the putututu of an Inca messenger. But Malefico Durador is not going to make it that easy for them…

Each book allows us to enjoy an exciting journey through time with Victor, Cristina, Ibys, and Kali. Readers will find some questions that allow them to discover historical curiosities about ancient civilizations. To do this, they will need to use the hour's watch, included in the book, to decipher the page number hidden behind a red background, thus enabling them to travel in time to uncover incredible historical facts.