Editing Cards on the Table (section)

==Foreword by the author==
The novel contains a foreword by the author in which she explains that the novel has only four suspects and that since any of them, given the right circumstances, might have committed the crime, the deduction must be "entirely psychological". She notes that the book is no less interesting for that since "when all is said and done it is the ''mind'' of the murderer that is of supreme interest".<ref>{{Cite book|last=Christie|first=Agatha|title=Cards on the Table|publisher=Pan Books|year=1936|edition=paperback, 1972 printing|location=London|at=Foreword by the Author}}</ref>