El gran libro de las matemáticas del Ogro feroz

Who were the earliest Americans? When, how, and from where did they enter and spread across the continent? And what is their relationship to modern Native Americans? Anthropologists develop theories to answer these questions based on the evidence they discover. Their theories—and the discoveries that prove and disprove them—are highlighted in this fascinating volume, full of awe-inspiring facts and incredible breakthroughs. Readers will feel like anthropologists and archaeologists themselves as they read about bones and artifacts, and what they reveal about the ancient cultures that roamed...

Eleven-year-old Jenny, whose family came from Russia to America to start a new life, meets the famous Russian composer on his 1891 trip to the New World and writes about it in her diary.

Invites young readers to learn to count in English and Spanish as they search for the right place to put the reusable stickers.

En 1938, un brigadista norteamericano desaparece durante la batalla del Ebro, cerca de La Fatarella. Setenta años después, Barbara Stein, su nieta, viaja hasta allí para descubrir las circunstancias de su muerte. Su propósito queda truncado por un misterioso asesinato en el que se ve involucrada y que activa recuerdos traumáticos de la República y la guerra. Enfrentándose a esta nueva situación, Barbara acaba descubriendo la fascinante historia de amistad, misterio y traición que vivió su abuelo, en compañía de un niño de La Fatarella.