Being the fickle creatures we are, we're massive fans of anything flexible and changeable.

So when we discovered this product design by architecture office, STAD, it instantly appealed.

Called, funnily enough, 'Massive', this set of shaped wood blocks is a very simple yet endlessly customisable series of bookends.

Available in three different sizes, their shape allows you to organise and showcase your books in a multitiude of configurations; and by turning the blocks upside down, they easily adapt to any number or size of books.

Clever.