Robert J Sawyer 
Wake 
Book One In The WWW Trilogy

Caitlin Decter is young, pretty, feisty, a genius at mathand blind. But, she can surf the Net with the best of them, following its complex paths in her mind. When a Japanese researcher develops a new signal-processing implant that might give her sight, she jumps at the chance, flying to Tokyo for the operation. But the visual cortex in Caitlins brain has long since adapted to allow her to navigate online. When the implant is activated, instead of seeing reality, she sees the landscape of the World Wide Web spreading out around her in a riot of colours and shapes. While exploring this amazing realm, she discovers somethingsome otherlurking in the background. And its getting smarter