copyright 1949; "This is a Red Badge Mystery"; Dodd, Mead & Company publishers, New York; hardbound in grey boards with red decor on cover and spine; quite good condition with unmarked strong pages; some age foxing on pages but not bad - see pics.
 
description -
Crooked House is a work of detective fiction by Agatha Christie first published in the US by Dodd, Mead and Company in March 1949 and in the UK by the Collins Crime Club on 23 May of the same year. 
The action takes place in and near London in the autumn of 1947. Christie said this and Ordeal by Innocence were her favourites amongst her own works.
 
Plot -
Three generations of the Leonides family live together under wealthy patriarch Aristide. His first wife Marcia died; her sister Edith has cared for the household since then. His second wife is the indolent Brenda, decades his junior, suspected of having a clandestine love affair with Laurence the grandchildren's tutor. After Aristide is poisoned by his own eye medicine (eserine), his granddaughter Sophia tells narrator and fiancé Charles Hayward that they cannot marry until the killer is apprehended. Charles's father, "The Old Man", is the Assistant Commissioner of Scotland Yard, so Charles investigates from the inside along with assigned detective, Chief Inspector Taverner.