Some feedback: I had some problems with the auto-complete on the front page search. I typed and hit enter expecting to go to a search results page, but instead it must've selected the top result in the autocomplete and took me to that page instead.
When i got to a results page (Jasper Fforde in this case) and selected one of the books it too me to a "finding prices" page, but the page title is Page Not Found. Back button didn't seem to work after getting there either... had to manually go back to search results
The search results page didn't seem to be in any particular order. Again, looking at Jasper Fforde, was hard to know if there is a new book available here especially as there are a couple of different series he's written.
When i did find a book, was surprised there was only a listing from book depository, and then a message saying "oops ebay error". No amazon?
In all it's a nice interface/app, but I'm not entirely sure why I wouldn't just use goodreads (which you seem to be leveraging anyway).
Happy to have a chat if you want to catch up at some point, it's been a while :)