I've linked that ISBN of Magic Soup to the already indexed ISBN -- only the subtitle was subtly different but all other bibliographic details and the recipe content were identical.
Anytime anyone spots an unindexed title that needs linking to an indexed book, please email me directly at [email protected] with the specifics rather than posting it on the Forum. Ditto for any other questions related to Indexing or to Book/Magazine cataloging in the Library.