Paul Fiddes = Paul S. Fiddes
But searches for these names on the website don't find all books by him because his name is given differently in the metadata of different books.
A search for "Paul S. Fiddes" finds only this one:

A search for "Paul Fiddes" finds these other four:

EDIT: This might be merely a specific instance of the more general problem I reported afterwards here: https://community.logos.com/forums/t/218895.aspx