I'm very glad I intercepted one of Justina Robson's books en route to another library becasue this too was a very good read.

In a near future England where clever children are sent to a school to learn faster, Anjuli O'Connell is an exception, among all the exceptionally bright she's different, she has perfect recall, a memory that logs everything (would have made an exceptional librarian!). Her school friends carry over to her working life, partially because she can decode what they're talking about into understandable English.

WHen on of her friends dies while apparently trying to upload himself into the network, her world starts crumbling around her. There are secrets within secrets and the AI's are getting to an independant age.