Terry Pratchett at SFX Towers

Here's your first sneak peek of author Terry Pratchett visiting the SFX office to guest edit issue 196

SFX 196 is on sale on Wednesday 5 May with a behind-the-scenes report from Sky1's adaptation of Terry Pratchett's Going Postal , plus the start of our extended season of book coverage. You can win a ticket to the exclusive Waterstone's launch party in London too - click here for details .