Last to Leave the Room is a new novel of genre-busting speculative horror from Caitlin Starling,the acclaimed author of The Death of Jane Lawrence. The city of San Siroco is sinking. The basement of Dr. Tamsin Riversthe arrogantselfish head of the research team assigned to find the source of the subsidenceis sinking faster. As Tamsin becomes obsessed with the distorting dimensions of the room at the bottom of the stairsshe finds a door that didnΓÇÖt exist before – and one nightit opens to reveal an exact physical copy of her. This doppelg├ñnger is sweet and biddable where Tamsin is calculating and cruel. It appears fullyterribly humanpassing every test Tamsin can devise. But the longer the double existsthe more Tamsin begins to forget pieces of her lifeto lose track of timeto grow terrified of the outside world. With her employer growing increasingly suspiciousTamsin must try to hold herself together long enough to figure out what her double wants from herand just where the mysterious door leads…