There's an excellent piece in the latest London Review of Books by John Lanchester on Google: The Global Id.
Lanchester. John
The Global Id
London Review of Books 2006 28(2): 3-6
It's a review (but much more than that) of David Vise's the Google Story and John Battelle's The Search
PS I also offer this:
Is Google enough? Comparison of an internet search engine with academic library resources
Aslib Proceedings: New Information Perspectives, Vol. 57, No. 6. (2005), pp. 498-512.
Brophy J, Bawden D
P