La regla mola (si sabes cómo funciona)

Examines the nature of inclined planes and wedges, how they can reduce the amount of force necessary to perform work, and ways in which they are used.

Snouts, spines, or scutes help many animals survive. Information on why is contained in this engaging book.

Before she became First Lady of the United States, Melania Trump was known for being a model in the fashion industry. In this engaging volume, readers get to take a look into her life, from her early years in Europe and her emigration to the United States to her move into the White House. Colorful photographs paired with concise text make for a captivating book that is sure to appeal to readers of many ages and levels.

This complete Spanish translation of the highly acclaimed Isaac Asimov's 21st Century Library of the Universe is ideal for students still developing their English-language skills.