Dos-à-dos binding

[4] Two books frequently bound in this form were the New Testament and Psalter, which were both needed during church services.

Regardless of content, the outer boards of dos-à-dos bindings were usually embroidered, or covered with leather and then finished with gold.

bound dos-à-dos with Mary Roberts Rinehart's Isn't That Just Like a Man!, as published by George Doran in 1920.

The Ace Doubles binding was considered innovative, if gimmicky, at the time; the 18 October 1952 issue of Publishers Weekly describes it as a "trick format".

[10] More recently, the format was used for the 1990 Methuen paperback edition of Monty Python's Flying Circus: Just the Words, a two-volume collection of the scripts of the television series.