The event celebrating 40 years of one of radio's most beloved shows, I'm Sorry I Haven't A Clue!, has sold out for this year's Glasgow book festival, Aye Write!

Tickets have also sold out for the session featuring Tracey Thorn, singer in Everything But The Girl, as well as the children's event A Squash and a Squeeze.

Organisers of the annual literary festival, which runs from April 12 to 20, are reporting that tickets for another half-dozen events are selling "like hotcakes".

These popular events include those featuring Jon Ronson, Jeremy Vine, the novelist Maggie O'Farrell, the opening Cookie Cabaret, Ian Bell, Alex Gray, JG Moffat, the contemporary artist David Shrigley and broadcaster Gavin Esler.

The opening cabaret, debates on Scottish independence and the future of newspapers, a host of popular authors and a new series of creative writing courses are also part of this year's festival, which is based at the city's Mitchell Library.

Other writers, personalities and authors appearing at the festival, for which The Herald is media partner, include Sandi Toksvig, Darcey Bussell, Louise Welsh, Alasdair Gray, Mark Millar, AL Kennedy, Val MacDermid and Neil Forsyth, the creator of Bob Servant, Clive Stafford Smith and James Naughtie.

There will be a debate on the future of the media in Leveson: Six Months On, and a panel discussion of the Leveson Inquiry featuring Tom Watson MP, Brian Cathcart of Hacked Off, the commentator Nick Cohen and Chris Jefferies.

The celebration of BBC Radio 4's I'm Sorry I Haven't A Clue is to feature Barry Cryer, Tim Brooke-Taylor and Graeme Garden.

Extensive creative writing sessions involving Glasgow University, Strathclyde University and Glasgow Caledonian University will hope to inspire new writers, poets and authors.

Tickets for the festival are on sale at www.ayewrite.com.

Tickets can also be bought by calling 0141 353 8000 or in person at the Mitchell Library, the Royal Concert Hall Box Office and the City Halls Box Office.