It is a promo for 4th Estate Publishers, and the “where” it refers to is the world of books. The designers and animators have taken a literal take on the phrase and created a world made, literally, from books.
You can see a time-lapse video of the animators preparing materials and another of them arranging a shot for the film here.
The animation was produced over a three week period in 2008, and was produced to mark the publisher’s 25th anniversary.
It starts, aptly enough, with a bit of flip book style animation in the pages of a book, and transitions nicely into a walk through the the book world; including nicely atmospheric “night” scenes, in which the darker side of things is displayed.
Charming, imaginative and beautifully done.