Mr Standfast
| First edition cover | |
| Author | John Buchan | 
|---|---|
| Language | English | 
| Series | Richard Hannay | 
| Genre | Thriller | 
| Publisher | Hodder & Stoughton, London | 
| Publication date | 1919 | 
| Publication place | United Kingdom | 
| Media type | Print (Hardcover) | 
| Preceded by | Greenmantle | 
| Followed by | The Three Hostages | 
Mr Standfast is the third of five Richard Hannay novels by John Buchan, first published in 1919 by Hodder & Stoughton, London.
It is one of two Hannay novels set during the First World War, the other being Greenmantle (1916); Hannay's first and best-known adventure, The Thirty-Nine Steps (1915), is set in the period immediately before the war started.
The title refers to a character in John Bunyan's Pilgrim's Progress, to which there are many other references in the novel; Hannay uses a copy of Pilgrim's Progress to decipher coded messages from his contacts, and letters from his friend Peter Pienaar.