title_body: Are there any ebook search engines? Are there any websites that work like ebook search engines, where you can perform a search over multiple stores and have the results sortable and/or filterable for file format, price, presence of DRM, and so on?
upvoted_answer: The one I use is Luzme It queries several stores including Kobo, Amazon, B&amp;N and in several countries.
  
  It then for each book shows the price that it last saw for each source and country.
  
  It is searchable by book name and author and series, although the series data is not complete as it comes from the stores.
  
  You can set up a wishlist of books and emails can be sent when they change price.
  
  This site does provide DRM status if the store makes that data available.
  
  The format is not shown however Amazon sites provide Kindle format and others at least ePub - I would be interested in any exceptions