The clocks

The Clocks is a work of detective fiction by Agatha Christie and first published in the UK by the Collins Crime Club on 1963 and in the US by Dodd, Mead and Company in 1964.

Synopsis:

Sheila Webb expected to find a respectable blind lady waiting for her at 19 Wilbraham Crescent—not the body of a middle-aged man sprawled across the living room floor. But when old Miss Pebmarsh denies sending for her in the first place, or of owning all the clocks that surround the body, it’s clear that they are going to need a very good detective.