Rasmussem Corporation Series by Vivian Vande Velde

It's the most advanced computer role-playing game ever: When you play you're really there in a dark dream teeming with evil creatures, danger-filled fortresses, and malevolent sorceries. The game plugs directly into your brain--no keyboard, no modem, no monitor. And for game hacker Arvin Rizalli and his friends, no cash up front, no questions asked . . . and no hope of rescue when the game goes horribly, deathly wrong.

In the virtual reality game Heir Apparent, there are way too many ways to get killed--and Giannine seems to be finding them all. Which is a darn shame, because unless she can get the magic ring, locate the stolen treasure, answer the dwarf's dumb riddles, impress the head-chopping statue, charm the army of ghosts, fend off the barbarians, and defeat the man-eating dragon, she'll never win. And she has to, because losing means she'll die--for real this time.

Grace Pizzelli is the average one, nothing like her brilliant older sister, Emily, who works for Rasmussem, creators of the world’s best virtual reality games. The games aren’t real, though—or at least they weren’t. Now Emily has hidden herself inside a pink and sparkly game meant for little girls. No one knows why, or how to convince her to come back out, and the technology can’t keep her safe for much longer. Grace may consider herself average, but she’s the only one who can save Emily... moreGrace Pizzelli is the average one, nothing like her brilliant older sister, Emily, who works for Rasmussem, creators of the world’s best virtual reality games. The games aren’t real, though—or at least they weren’t. Now Emily has hidden herself inside a pink and sparkly game meant for little girls. No one knows why, or how to convince her to come back out, and the technology can’t keep her safe for much longer. Grace may consider herself average, but she’s the only one who can save Emily. So Grace enters the game, hoping to talk her sister out of virtual suicide before time runs out. Otherwise Emily will die—for real. less