Perhaps you should try some spelling variations:
"A Fifty-minute series book" » "A Fifty-minute bodies book", "A Fifty-minute period book", "A Fifty-minute prices book", "A Fifty-minute services book", "A Fifty-minute series block", "A Fifty-minute stories book"
"a fifty-minute series books" » "a fifty-minute bodies books", "a fifty-minute period books", "a fifty-minute prices books", "a fifty-minute series bones", "a fifty-minute server books", "a fifty-minute sheriffs books", "a fifty-minute services books", "a fifty-minute series blocks", "a fifty-minute stories books", "_ fifty-minute series books", "a fifth-minute series books"
"A Fifty-minute survey book" » "A Fifty-site survey book"

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"A Fifty-minute series book\") OR (\"A Fifty-minute survey book\"))) OR (\"a fifty-minute series books\"))".
• Removing quotes may allow a broader search: (((( A Fifty-minute series book ) OR ( A Fifty-minute survey book ))) OR ( a fifty-minute series books )).
• Adding a wildcard symbol may retrieve word variants: (((("A Fifty-minute series book") OR ("A Fifty-minute survey book"))) OR ("a fifty-minute series books"))*.