Product Description: Teaches chemistry to health care professionals and students. Covers chemical principles, atomic and molecular structure, and organic substances, particularly acids, bases, salts, buffers, and redox reactions and their associated equilibria--encouraging students to see these not as isolated subjects, but as substances that profoundly affect their own health...read more

Product Description: Nacido en una frontera alternativa America, donde la vida es dura y la magia popular es real, Alvin esta dotado con el poder. Tiene que aprender a usar su don con sabiduria. Pero las fuerzas oscuras se unen contra Alvin, y solo una chica joven con clarividencia puede protegerlo...read more

Product Description: From the internationally bestselling author of Ender’s Game comes a boxed collection of all three riveting books in the Pathfinder Trilogy!A powerful secret. A deadly path. In Pathfinder, Rigg—a teenager who possesses a secret talent that allows him to see the paths of people’s pasts—joins forces with another teen with special talents on a quest to find Rigg’s sister and discover the true significance of their powers...read more

Product Description: Despues del genocidio de los Insectores, Ender Wiggin desaparecio y en su lugar surgio una voz poderosa: la nueva religion de los Portavoces de los muertos, que sirven como sacerdotes a los que no creen en ningun Dios y, sin embargo, creen en los valores de los seres humanos...read more

Product Description: La guerra ha terminado, ha sido ganada por Ender Wiggin y su equipo de brillantes ninos-guerreros. El enemigo es destruido, la raza humana se ha salvado. Ender se niega a regresar al planeta, pero su equipo ha ido a casa con sus familias, esparcidos por todo el mundo...read more

Product Description: A dramatization written by Orson Scott Card, based on his bestselling novel and the upcoming theatrical film release. 70 years after a horrific alien war, an unusually gifted child is sent to an advanced military school in space to prepare for a future invasion.

Product Description: From the author of Ender’s Game, the soon-to-be major motion picture!A powerful secret. A deadly path. Delve into the first two volumes in the New York Times bestselling Pathfinder series in this boxed set. From the internationally bestselling author of Ender’s Game comes the story of Rigg, a teenager who possesses a secret talent that allows him to see the paths of people’s pasts...read more

[Library Edition Audiobook CD in Vinyl case.] [Read by Emily Rankin and Stefan Rudnicki][*Afterword read by the author - Orson Scott Card] In this sequel to The Lost Gate, bestselling author Orson Scott Card continues his fantastic tale of the mages of Westil, who live in exile on Earth. Here on Earth, Danny North is still in high school, yet he holds in his heart and mind all the stolen outselves of thirteen centuries of gatemages. The Families still want to kill him if they can't control him -- and they can't control him; he is far too powerful. On Westil, Wad is now nearly powerless -- he lost everything to Danny in their struggle. Even if he can survive the revenge of his enemies, he must still somehow make peace with the Gatemage Daniel North, for when Danny took that power from Loki, he also took responsibility for the Great Gates. And when he comes face-to-face with the mages who call themselves Bel and Ishtoreth, he will understand just why Loki closed the gates all those centuries ago.

Product Description: En La sombra del gigante, un desorden genetico hace inminente e inevitable la muerte de Bean, el lugarteniente de Ender en la Escuela de Batalla. Su juventud y triste destino originan un brillante y dramatico retrato del proceso de maduracion de joven a adulto...read more