title: Are there any good APIs to search for books via ISBN?
body: <p>I am working on an iOS app and I have a list of ISBNs. I want to pull up book cover image, title, author, and other nice-to-haves if available, like reviews, price, etc. I tried using the Google Books API, but newer books are not listed in their service. I need a service that has up-to-date ISBNs, particularly for University textbooks in the United States.</p>
  
  <p>For example, the following ISBN returns 0 results via the Google Books API (and others I tried): 
  <a href="https://www.googleapis.com/books/v1/volumes?q=isbn:9780134092669" rel="noreferrer">https://www.googleapis.com/books/v1/volumes?q=isbn:9780134092669</a></p>
  
  <p>But a book does exist with that ISBN: 
  <a href="http://www.isbnsearch.org/isbn/9780134092669" rel="noreferrer">http://www.isbnsearch.org/isbn/9780134092669</a> </p>
  
  <p>My question is: are there any good APIs that I can use, free or otherwise, to search for books via ISBN? The only thing I can find is the Amazon Product Advertising API, which is complete overkill.</p>