Here is a great book on Imperial College London:

Hannah Gay, editor.
The History of Imperial College London, 1907-2007
World Scientific, February 2007

The usual prices are US$98/S$165 (hardcover) and US$48/S$81 (softcover). However, as a member of ICAAS, you can buy it online at a 30% discount by keying in the ICAAS discount code "P478".