Los juicios por brujeria en Salem

Para jóvenes lectores que además ejercen de espías, detectives, conspiradores y aventureros, este libro presenta todo tipo de sistemas, de lenguajes y de ingenios para crear y ocultar mensajes secretos. Desde las órdenes cifradas de Julio César, hasta el extraño mensaje en clave que escribió el hombre de la máscara de hierro, el código que utilizó Sherlock Holmes o la fabricación de tinta invisible, con ejercicios prácticos y un diploma acreditativo.

Two plays by Juan Mayorga that exemplify the author's philosophical drama. Hamelin is set in an unnamed, corrupt city where the powerful and rich prey on the poor. Will a Pied Piper save the city's children from the "rats" that plague it? La tortuga de Darwin tells the story of Harriet, the tortoise that Charles Darwin brought back to England from the Galapagos. Since her voyage, Harriet has evolved into a turtle-woman, able to think, speak, and bear witness to the terrible events of the past two centuries.

A stinky look at the history of personal hygiene reveals fascinating facts, such as the invention of the toilet, how many times Queen Elizabeth I had a bath, how the first sewers were built, and much more.

Different colors are all around us, and this series explores what they look like and where they can be found. Students identify common colors from everyday life, such as red, blue, green, yellow, and how to describe them. They also learn to classify colors by examining what types of objects display each color. Consistently placed and leveled text helps to ensure subject matter is clearly understood.