Betsy Ross

Describes the impact of the light bulb and effective indoor electric lighting, and recounts the life and career of their inventor, Thomas A. Edison.

Practice time measurement by timing races! Racing is all about having the fastest time, so accurate time measurement is very important for athletes! Young readers will learn all about how athletes measure racing times and will practice their mathematical and STEM skills. The Spanish-translated text, vibrant images, fun practice problems, and helpful mathematical charts in this title make time measurement seem exciting and simple!

A foundered Victorian ship looking for the fabled Northwest Passage holds a secret in its icy grave... When Dirk Pitt of NUMAr is almost blown to pieces in a lab explosion, he suspects sabotage. The lab in question belongs to a scientist hoping to use a rare mineral to combat greenhouse gases - but who would want to destroy our one chance to save the planet? However, there are those who will do anything to control such a valuable prize. Pitt's investigations take him to the Arctic in search of a clue to the origins of this precious mineral. There he and NUMAr colleague Al Giordino must battle ...

El polémico libro que desvela al verdadero J.D. Salinger Joyce Maynard vivió en la granja del escritor J.D. Salinger, entonces de 53 años, fue una convivencia demoledora que la marcaría para siempre. En este libro Joyce desgrana sus recuerdos con sinceridad y valentía.