Xronixle

"A snowflake fell amongst the digital trees, pulsing lightly as it passed between its brothers, floating down to the white ground. X stood with his hands on the railing of the wooden bridge he had just finished creating, admiring the texture. It felt just like it would have in Terrareal, out there where nature was the true creator, where the bridge was just the sum result of necessity, a tool to be used to cross the oft-empty creek below it. But here, in the virtual construct, buried deep in the outer reaches of the Net, it was a true miracle. To make it feel like it did, smell like it did, was a feat that X took great pride in."
When X discovers that his long distance relationship with C is about to end, he copies her mind and loads her into a virtual avatar in the Net. But in his haste to preserve his high school sweetheart, X forgets to program the one feature he ends up needing most: how to turn her off.
Now it is up to Natalie and G to rescue their friend from the farthest reaches of the Net. Along the way, they must battle a cipher who cannot be killed, a virus that cannot be stopped, and a global conglomerate that will do anything to seize control of the precious Net.