At the moment (December 18, 2015), data in the Piano Book Guide consists of 1,885 records!
This figure is the total number of lines visible via the home page of Piano Book Guide. There is a difference between the number of records and the number of books that are included on the Piano Book Guide. For example, Bach’s Kleine Präludien und Fughetten appears 11 times. Thus, 11 records for one book.
Here’s to 2,000 records!