“The 20 irrefutable theories of book cover design” from the Edinburgh Book Festival (via Bruce Mau Design).
11. Unheimlich theory
This theory takes a familiar image or symbol and makes it strange or unsettling. One cover of Lolita uses the image of a girl’s bedroom wall to represent a girl’s legs and underwear.
Hansel and Gretel and Other Stories by The Brothers Grimm
Illustrated by K. Nielsen
Publisher: New York, George H. Doran Company, 
Finely bound by The Chelsea Bindery in full dark blue morocco, titles and decoration to spine gilt, pictorial multi-coloured onlay of The Gingerbread House to the front board, inner dentelles, original endpapers, gilt edges. With 12 colour and 12 black and white illustrations