Two works issued together without a collective title
Two works issued together without a collective title are usually found in children's books. Most common is the tête-bêche format: two stories bound together such that a reader starts from the "front" cover and follows a story to the middle of the book, at which point the reader flips the book upside down and starts the other story from the "back" cover.
See RDA 2.3.2.9 (Manifestation Lacking a Collective Title)[1] and RDA 3.4.5.13 (Pages Numbered in Opposite Directions)[2].
Main title
If there are two title pages, use the title from the spine, or the title page or cover that does not have the UPC/ISBN on it. Separate the titles with a semicolon if both are by the same author.[3]
Example:
ocm55154066 100 1_ Numeroff, Laura Joffe, ‡eauthor. 245 10 What aunts do best ;‡bWhat uncles do best /‡cby Laura Numeroff ; illustrated by Lynn Munsinger.
Separate the titles with a period if they have different statements of responsibility.[3] There are no subfield codes for the second title.[4]
Example:
ocm60391430 100 1_ Thorpe, Kiki,‡eauthor. 245 10 My side of the story /‡cby Peter Pan ; as told to Kiki Thorpe ; illustrated by the Disney Storybook Artists. My side of the story / by Captain Hook ; as told to Kiki Thorpe ; illustrated by the Disney Storybook Artists.
Added titles
If the works have not been previously published separately, the second title should be traced in a 246 field.[5]
Example:
ocm55154066 100 1_ Numeroff, Laura Joffe, ‡eauthor. 245 10 What aunts do best ;‡bWhat uncles do best /‡cby Laura Numeroff ; illustrated by Lynn Munsinger. 246 30 What uncles do best.
If the works were originally published separately, use the uniform title of the work that occurs first in the item and add an uncontrolled analytical added entry for the second work.[6][7][8]
Example:
ocm20931206 100 1_ Wahl, Jan,‡eauthor. 240 10 Dracula's cat 245 10 Dracula's cat ;‡band Frankenstein's dog /‡cstory by Jan Wahl ; pictures by Kay Chorao. 740 02 Frankenstein's dog.
Notes and form headings
An explanatory note and form heading is needed if the second work is on inverted pages.[9].
Example:
ocmocm51853326, ocm48942488
500 Works bound tête-bêche, back-to-back and inverted.
655 _7 Upside-down books.‡2lcgft
An explanatory note is needed if the second work is not inverted but rather shares an internal "cover" so that both sides share the same "up" direction. (There is no form heading for this style of binding.)
Example:
ocm55661421, ocm53967239 500 Bound dos-à-dos; book opens to the right from both the front cover and the back cover.