Robert P Helwig author data searchable via API

Robert P Helwig

Retrieve the information about Robert P Helwig and his books on the go! Keep your project up to date with the ISBNdb book database searchable via API with 19 data points per book available.

This is an excerpt from the ISBNdb database. Need more data? Get a FREE 7 day trial and get access to the full database of over 35 million books and all data points including title, author, publisher, publish date, binding, pages, list price, and more.