The book introduces the characters of Tommy and Tuppence who feature in three other Christie novels and one collection of short stories; the five Tommy and Tuppence books span Agatha Christie's writing career.
Buku tersebut memperkenalkan karakter Tommy and Tuppence yang tampil dalam tiga novel Christie lainnya dan satu kumpulan cerpen; lima buku Tommy and Tuppence muncul sepanjang karier penulisan Agatha Christie. ^ a b The English Catalogue of Books.