The best deals for buying Web.Studies online:

UK and Europe
From Blackwell's for £14.99 with free delivery.

USA
From Barnes & Noble for $19.96 + $4.29 delivery = $24.25. [Usual price: $24.95].

Next-best alternatives:
UK: From The Book Place for £13.49 (+£2.00 delivery for one book).
USA: From Amazon.com for $24.95 (+delivery).

 
Read the entire introduction to the book,
Web Studies: A User's Guide -- a complete chapter of over 8,500 words.