Just as I finished writing about the downsides of casters, I see an addendum about casters.

A collection on casters! This is in the children’s library in the Idea Store Whitechapel. (More on Idea Store, and the Whitechapel one in particular, shortly.) While I’m not that fond of casters generally, I have to say, this puts a new spin on the idea of mobile shelving. Mary Ann Mavrinac always said the goal of good library design is people space over collection space, and this is another example of that ethos. When people need it to, the collection slides out of the way.