I hope this is the right place to post this. I recently came across this sitehttp://www.cats.10top10lists.com/Home_Page.php
which is to publicise a book for cat lovers, and they donate 50% of the sale price of every book to cat related charities see this pagehttp://www.cats.10top10lists.com/How_We_Donate.php
I nominated our local animal sanctuary Kays Hill as they are struggling with funds to complete their cattery building and they have included them in their January donation list as you can see here http://www.cats.10top10lists.com/Where_We_Donate.php
There are three places left for donations in January and all you need to do is contact them at email@example.com with a brief summary and website url for the nonprofit you are submitting. I got an email back within a day. They donate via paypal.
The thing is it depends on book sales, it might not be a lot, but anything, even a £5 note, helps doesn't it?