Alexander Graham Bell

El sabueso de los Baskerville es la más famosa y para muchos la mejor aventura de Sherlock Holmes. La novela surgió de un comentario que escuchó Conan Doyle de su amigo Fletcher Robinson sobre un perro espectral que merodeaba cerca de su casa en Dartmoor. Fue publicada por primera vez como serial en The Strand Magazine en 1901, y al año siguiente en forma de libro debido a su enorme éxito. Desaparecido en las cataratas de Reichenbach cuando resolvía el caso de “El problema final” –última historia de Las aventuras de Sherlock Holmes (no 4 de El Canon)–, el gran detective...

This book is a comprehensive, practical presentation of the principles of behavior modification and guidelines for their application. It teaches forms of behavior modification ranging from helping children learn necessary life skills to training pets, to solving personal behavior problems.

Sitting Bull first went to battle at the age of 14. He grew to be widely respected for his bravery and insight, and became chief of the Lakota nation in his thirties. By the time he met General Custer at the Battle of Little Big Horn, his courage was legendary. Though he soundly defeated Custer, public outrage at the defeat brought thousands of cavalrymen to the area, where it took four more years before the brave chief would surrender. He was forced onto a reservation where he was later killed when police attempted to arrest him.

¿Por qué se nos tapan los oídos en un elevador? ¿Qué hace que los globos de aire caliente suban al cielo? Descubre todo lo que hace el aire en este maravilloso libro.