Hmm, it's opening just fine for me. Here's the description from the home page:
Welcome to the Wrox Reference Library, offering web access to the full contents of dozens of books from Wrox.
Search, browse and view the complete contents of every book in the library.
Create personal bookshelves and add bookmarks and notes. Quickly find the information you need to get the job done, wherever you may be.
Jim Minatel
Acquisitions Director
Wiley Technology Publishing
WROX Press
Blog:
http://wroxblog.typepad.com/
Wrox online library:
http://wrox.books24x7.com