On Overgrown Paths is the English title of a 1949 novel by Norwegian author Knut Hamsun, and is seen as the author's attempt at proving his soundness of mind after his sanity was called into question. It was his last literary work. The book is part fiction, part diary, part an old man's apologia and part a pamphlet in opposition to the ruling given in the 1948 court trial against him, that he had "permanently impaired mental abilities".
The original Norwegian version was titled Paa gjengrodde Stier.
English editions 
The first translation to English was published in 1967.
One translation was done by Sverre Lyngstad.
Other languages 
The novel has been published in German, Italian and Icelandic. 
The writing of this book is shown, in part, in the film Hamsun (1996), directed by Jan Troell. In the film, Hamsun is portrayed by Swedish actor Max von Sydow.