Tomorrow is the 8th annual World Book Day, the "biggest annual celebration of books and reading in the UK and Ireland". So not exactly 'the world' then but who cares eh?
As you'd imagine there's quite a few things going on in the capital to coincide with WBD. You can check the whole 'events diary' at this page, but if you've got kids then you should probably contact your local library as they should have something organised.
Londonist is particularly excited by the 'Guess the Book Title' competition which is taking place at the Barbican Library tomorrow: "Staff will be in costume dress as adult and children’s book titles. Public need to guess the title based on the costume and a clue, which is the first line in the book."
Why do we have to be at work when there's cool stuff like this going on? There's just no justice in the world.
Slightly more, erm... 'grown up' events are taking place at Borders outlets all over the country, and there's also Alexander 'Lady Detective' McCall Smith at Waterstones in Piccadilly. While the LRB bookshop in Bury Place has Gillian Slovo appearing.
If you want to partake in World Book Day from the comfort of your desk then you can always visit the Reccomend A Book site, which allows you to send an e-card to someone to tip them off about a good read.
This one is definitely Londonist's favourite.
And, no, we're not sure how the gorilla fits into it all.