A little help with my book problem?

I'm looking for a book called Darkness within by Kinley Macgregor/ Sherrilyn Kenyon but I can't find it anywhere. 4shared doesn't have it and when I went to town the other day and asked for it at waterstones and whsmiths they said that they didn't have it either. Where can I get it from?|||Local library?|||http://www.amazon.co.uk/Darkness-within-鈥?/a>|||Try amazon I always get my books from there, if you use another seller make sure they have good feedback though. I love Sherrilyn Kenyon books :)|||amazon