The event was first celebrated back in 1998 and children are encouraged to dress as their favourite book characters. This selection of pictures captures some of the events that were held since then, right through to 2010, and shows kids from all different schools. Can you spot yourself? Or anyone you know? READ MORE: Go back to 1995 and life in Preston. IN CASE YOU MISSED IT: Look back at Preston Beavers and Cubs through the years. MORE MEMORIES: Go on an adventure with Preston Brownies of the past
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13. World Book Day
Book week fancy dress at St. James School, Leyland in 2006 Photo: Neil Cross
14. World Book Day
All dressed as Oliver Twist, from left, Thomas Rishton, Tyler Anderson, Matthew Rimmer, Calen Kirkpatrick, Oliver Adamson and George Lay, as part of book week at English Martyrs Primary in 2009 Photo: Donna Clifford
15. World Book Day
Pupils from Fulwood and Cadley Primary School in 2009, dressed as heroes as part book week Photo: Ian Robinson
16. World Book Day
There was an alien invasion at English Martyrs Primary School book week in 2008 Photo: Neil Cross