Literature’s great sister acts

Sarah Crown: Fiction has long outstripped psychology in exploring the bond between sisters. Who are your favourite female siblings in literature?

Trying to revive the Renaissance

Jonathan Jones: One of the things that attracted me to the story of Leonardo and Michelangelo's titanic clash in Florence was the chance to annoy revisionist art historians

Poster poems: the Hay festival

Billy Mills: The genre of 'poems about literary festivals' is a narrow one, so get writing – even a haiku about portable toilets will do

This is a healthy moment for art

Grayson Perry: We've got a Conservative government to fight against. It might not feel like it, but this is a healthy time for art