This website is fantastic!  It provides links to to other sites on a
range of books...  you can check out plot summaries, reviews, and
notes about the author.
http://www.gamequarium.com/readquarium/booksah.html                                                                                                                                

This website has some great reviews.  Check out the new books in the
Alex Rider series by Anthony Horowitz.
http://www.kidsreads.com/series/series-alex_rider.asp



Explore games, blogs, and post your own opinion on this website. 
http://www.scholastic.com/kids/stacks/index.asp



Take a closer look at the world of Roald Dahl!
http://www.roalddahl.com/

Have a look at these other great websites...
http://www.ukchildrensbooks.co.uk/
http://www.woodlands-junior.kent.sch.uk/besmart/cool2.html