Delete This At Your Peril is a collection of email exchanges between "Bob Servant", the fictional author, and Internet spammers. It was released in the UK in 2007 and the USA in 2008.

The email exchanges in the book are genuine exchanges between Bob Servant and a series of Internet spammers, largely from Africa and Russia. They are characterised by Servant's increasingly surreal contributions and growing frustration on the part of the spammers. Servant talks to the spammers about his life in Broughty Ferry, a suburb of Dundee which is also the hometown of Forsyth. Forsyth has described the emails as a "slightly strange hobby". On publication the character of Bob Servant was compared to that of John Shuttleworth and a number of reviewers drew comparison to Henry Root, the creation of Willie Donaldson.