The first three books in the "Harry Hole" series are "The Bat," "Cockroaches" and "The Redbreast." The books are written by Joe Nesbo, and are part of a series which includes 10 titles.
The "Harry Hole" series revolves around the investigations of an Oslo-based detective. The books are highly popular due to how likable the main character is. Profoundly human, and deeply flawed with serious authority issues, the main character is one that readers sympathize with and can relate to on a personal level. The first book in the series was published in 1997, and the most recent book, as of 2015, is "Police," published in 2013.