Performance artist Marina Abramovic discusses her new project 512 Hours at the Serpentine Gallery in London in which there is no art on display, simply Abramovic herself welcoming 300 visitors a day to an empty gallery space; Hotel is a new play by Polly Stenham, best known for writing That Face and Tusk Tusk. Set in an exclusive hotel on a beautiful but poverty-stricken island, a family's luxury holiday is interrupted by violence. Susannah Clapp reviews. Emma Healey's debut novel Elizabeth Is Missing is told from the perspective of 82-year-old Maud who is suffering from dementia. Emma discusses the inspiration behind her book and reveals the tactics of some of the nine publishers who tried to woo her. And composer David Lang on his composition for 1000 voices, Crowd Out, to be performed in Birmingham this weekend, inspired by a trip to the Arsenal football stadium.