He presents You’ve Been Framed!, so perhaps it should be no surprise that Harry Hill feels like a friend to Perth prisoners.
The comedian appears with Hitler and Glaswegian gangsters in a list of the most sought-after authors and subjects amongst bookworms at HMP Perth.
Jail bosses have released the top 10 lists of the most borrowed books at their establishments across Scotland.
In HMP Perth’s list of top reads, the likes of Harry Potter, Stephen King and Irvine Welsh don’t get a look in.
But the little-known true crime novel Glasgow Crimefighter by former detective Les Brown and Robert Jeffrey has gone straight in at number one.
It is closely followed by some much needed light relief: Harry Hill’s Whopping Great Joke Book, which contains a whole section on crime-related funnies.
The bestseller includes the some-might-say criminal joke: “My father is in prison for something he didn’t do. He didn’t run fast enough.”
At number three, is the history book Reflections on Scotland by Ian Wallace, followed by a collection of Celtic borders art by A Meehan.
Career criminal Paul Ferris, whose life was made into the film The Big Man, is in at number seven with his last novel Villains, subtitled It Takes One To Know One.
An account of Hitler’s Holocaust by German author Guido Knopp is at number nine.
The only fiction title, The Hard Way by Lee Child, sneaks in at number 10.
The prison library, which is managed by Perth and Kinross Council, has around 6,000 titles including audiobooks, magazines and graphic novels.
A local authority spokeswoman said it contains a similar selection to those found in typical public libraries.
The lists vary wildly from prison to prison. At HMP Shotts, for example, George R Martin’s Games of Thrones Book One, The Gunslinger by Stephen King and Bear Grylls’ Survival Guide for Life are the three most borrowed.
The Guardians of the West fantasy series by David Eddings is the most popular at Glenochil and Edinburgh. Their lists also feature Harry Potter and Ian Rankin.
And the top spot at Barlinnie? The Book of Glasgow Murders by Donald Fraser, of course.