diff --git a/api/rbdigital.py b/api/rbdigital.py
index 496d60c38..ee9214a64 100644
--- a/api/rbdigital.py
+++ b/api/rbdigital.py
@@ -1608,9 +1608,22 @@ def isbn_info_to_metadata(cls, book, include_bibliographic=True, include_formats
             Identifier.RB_DIGITAL_ID, rbdigital_id
         )
 
+        # medium is both bibliographic and format information.
+
+        # options are: "eBook", "eAudio"
+        rbdigital_medium = book.get('mediaType', None)
+        if rbdigital_medium and rbdigital_medium not in cls.rbdigital_medium_to_simplified_medium:
+            cls.log.error(
+                "Could not process medium %s for %s", rbdigital_medium, rbdigital_id)
+
+        medium = cls.rbdigital_medium_to_simplified_medium.get(
+            rbdigital_medium, Edition.BOOK_MEDIUM
+        )
+
         metadata = Metadata(
             data_source=DataSource.RB_DIGITAL,
             primary_identifier=primary_identifier,
+            medium=medium,
         )
 
         if include_bibliographic:
@@ -1706,16 +1719,6 @@ def isbn_info_to_metadata(cls, book, include_bibliographic=True, include_formats
                 )
                 subjects.append(subject)
 
-            # options are: "eBook", "eAudio"
-            rbdigital_medium = book.get('mediaType', None)
-            if rbdigital_medium and rbdigital_medium not in cls.rbdigital_medium_to_simplified_medium:
-                cls.log.error(
-                    "Could not process medium %s for %s", rbdigital_medium, rbdigital_id)
-
-            medium = cls.rbdigital_medium_to_simplified_medium.get(
-                rbdigital_medium, Edition.BOOK_MEDIUM
-            )
-
             # passed to metadata.apply, the isbn_identifier will create an equivalency
             # between the RBDigital-labeled and the ISBN-labeled identifier rows, which
             # will in turn allow us to ask the MetadataWrangler for more info about the book.
@@ -1760,7 +1763,6 @@ def isbn_info_to_metadata(cls, book, include_bibliographic=True, include_formats
 
             metadata.title = title
             metadata.language = language
-            metadata.medium = medium
             metadata.series = series_name
             metadata.series_position = series_position
             metadata.publisher = publisher
@@ -1781,7 +1783,7 @@ def isbn_info_to_metadata(cls, book, include_bibliographic=True, include_formats
                 drm_scheme = DeliveryMechanism.NO_DRM
                 formats.append(FormatData(content_type, drm_scheme))
             else:
-                cls.log.warn("Unfamiliar format: %s", format_id)
+                cls.log.warn("Unfamiliar format: %s", metadata.medium)
 
             # Make a CirculationData so we can write the formats,
             circulationdata = CirculationData(
diff --git a/core b/core
index 328e9e97c..ed64447a2 160000
--- a/core
+++ b/core
@@ -1 +1 @@
-Subproject commit 328e9e97c45289a494397196ca99eff867ea2ec3
+Subproject commit ed64447a2133ccc6e19d1a33d57be682b02b8bcd
diff --git a/migration/20181016-recalculate-presentation-for-audiobooks-believed-to-be-books.py b/migration/20181016-recalculate-presentation-for-audiobooks-believed-to-be-books.py
new file mode 100755
index 000000000..69f5c65d3
--- /dev/null
+++ b/migration/20181016-recalculate-presentation-for-audiobooks-believed-to-be-books.py
@@ -0,0 +1,51 @@
+import os
+import sys
+from nose.tools import set_trace
+from sqlalchemy.sql import select
+from sqlalchemy.sql.expression import (
+    join,
+    and_,
+)
+bin_dir = os.path.split(__file__)[0]
+package_dir = os.path.join(bin_dir, "..")
+sys.path.append(os.path.abspath(package_dir))
+from core.model import (
+    dump_query,
+    production_session,
+    LicensePool,
+    DataSource,
+    Edition,
+    PresentationCalculationPolicy,
+)
+
+# Find all books where the edition associated with the LicensePool has a
+# different medium from the presentation edition.
+_db = production_session()
+
+# Find all the LicensePools that aren't books.
+subq = select([LicensePool.id]).select_from(
+    join(LicensePool, Edition,
+         and_(LicensePool.data_source_id==Edition.data_source_id,
+              LicensePool.identifier_id==Edition.primary_identifier_id)
+    )
+).where(Edition.medium != Edition.BOOK_MEDIUM)
+
+# Of those LicensePools, find every LicensePool whose presentation
+# edition says it _is_ a book.
+qu = _db.query(LicensePool).join(
+    Edition, LicensePool.presentation_edition_id==Edition.id
+).filter(LicensePool.id.in_(subq)).filter(Edition.medium == Edition.BOOK_MEDIUM)
+
+print "Recalculating presentation edition for %d LicensePools." % qu.count()
+
+for lp in qu:
+    # Recalculate that LicensePool's presentation edition, and then its
+    # work presentation.
+    lp.set_presentation_edition()
+    policy = PresentationCalculationPolicy(
+        regenerate_opds_entries=True, update_search_index=True
+    )
+    work, is_new = lp.calculate_work()
+    work.calculate_presentation(policy)
+    print "New medium: %s" % lp.presentation_edition.medium
+    _db.commit()
diff --git a/requirements.txt b/requirements.txt
index 066de535a..35ed7c5f4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,6 +5,7 @@ elasticsearch-dsl<2.0.0
 pillow
 psycopg2
 requests==2.18.4
+urllib3<1.24 # Travis problem introduced 20181016 - check to see when we can remove
 sqlalchemy==1.2.0
 flask-sqlalchemy-session
 lxml