This is a link to a contributed Drupal module coded by Darrell Ulm in PHP for Drupal which uses the Google Books API to pull Google Books data into Drupal for use as a Drupal Text Filter.
The ResearchGate profile for Darrell Ulm contains links, skills, and references to Comp. Sci. research papers.
Here is the link for the ResearchGate.net profile for Darrell Ulm, Computer Science.