That's strange that the link won't work
Chris, it did for me when I tried it just now. Alternatively you could try the homepage of the publisher:
New Books and search for Higham. The book is also on that South American river:
The publisher says that the book will be out on April 1st, Amazon says May 30th in the UK but July 15th on the US site.
Apologies for the largish pictures
PPRune Pop! On my screen everything looks allright but I realise that not everybody has the same screen size. I'll go and edit the post.