Trayectoria de choque: Los asteroides y la Tierra (Collision Course: Asteroids and Earth)

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.

Recounts, in Spanish and in English, the story of Ricardo Romo, a Hispanic-American All-American athlete and scholar who became, among other things, a U.S. representative to the United Nations, and the president of University of Texas at San Antonio.

There is a bright light in the night sky. Sometimes it is round like a ball, sometimes it is a crescent, and sometimes it is not there at all! What is this strange and changing thing? It is the moon, of course! Read all about our moon and the moons surrounding other planets in this Spanish-translated book.

El robo de un diario personal permite que sus contenidos circulen de boca en boca por todo el palacio imperial. Así se descubre que dos mujeres, ambas al servicio de la emperatriz, se han enamorado del mismo hombre, un intrigante de la corte, desterrado por seducir a la vestal de Ise, una joven que ha sido elegida como protectora del reino.