In Dorothy Sayer's closing of her 'introduction' she had this to say, in part: " It is hoped that in running through the present volume, the reader will find himself presented with a kind of bird's-eye view of the general subject, extending from the literature of pure deduction on the one hand, through various types of mystery...natural and supernatural, explained and unexplained...to tales of sheer horror, without any mystery at all. Every tale in this book is guaranteed to have puzzled or horrified somebody; with any luck at all, some of them may puzzle and horrify you."