This pull requests add a way to catch row decoding errors:

self.name = try row.decode(String.self, atIndex: 0)
self.bookCount = try row.decode(Int.self, forColumn: "bookCount")

The use of those throwing accessors is not encouraged, because a database decoding error is a programming error. If an application stores invalid data in the database file, that is a bug that needs to be fixed.

Throwing accessors can be useful while debugging such an application, as described in #1786.

Other users can profit from the much shorter subscripts:

self.name = row[0]
self.bookCount = row["bookCount"]