A recipe book is opened to page 42, which has the recipe for an Old Fashioned and page 43 with a recipe for H.i. Collins.
A bartender's manual opened to the pages showing instructions for a an Old Fashioned and an H.i. Collins.
A book opened to page 42 and 43 where the title is Old Fashioned.
a book of drink recipes is open to the page with an Old fashioned recipe
A person has opened a book to page 43 titled Old Fashioned.