diff --git a/bookwyrm/activitypub/book.py b/bookwyrm/activitypub/book.py
index 2bfafba7..01bdcca9 100644
--- a/bookwyrm/activitypub/book.py
+++ b/bookwyrm/activitypub/book.py
@@ -7,23 +7,23 @@ from .base_activity import ActivityObject, Image
 @dataclass(init=False)
 class Book(ActivityObject):
     ''' serializes an edition or work, abstract '''
-    authors: List[str]
-    first_published_date: str
-    published_date: str
-
     title: str
-    sort_title: str
-    subtitle: str
-    description: str
+    sortTitle: str = ''
+    subtitle: str = ''
+    description: str = ''
     languages: List[str]
-    series: str
-    series_number: str
+    series: str = ''
+    seriesNumber: str = ''
     subjects: List[str]
-    subject_places: List[str]
+    subjectPlaces: List[str]
 
-    openlibrary_key: str
-    librarything_key: str
-    goodreads_key: str
+    authors: List[str]
+    firstPublishedDate: str = ''
+    publishedDate: str = ''
+
+    openlibraryKey: str = ''
+    librarythingKey: str = ''
+    goodreadsKey: str = ''
 
     attachment: List[Image] = field(default_factory=lambda: [])
     type: str = 'Book'
@@ -32,12 +32,12 @@ class Book(ActivityObject):
 @dataclass(init=False)
 class Edition(Book):
     ''' Edition instance of a book object '''
-    isbn_10: str
-    isbn_13: str
-    oclc_number: str
+    isbn10: str
+    isbn13: str
+    oclcNumber: str
     asin: str
     pages: str
-    physical_format: str
+    physicalFormat: str
     publishers: List[str]
 
     work: str
diff --git a/bookwyrm/models/book.py b/bookwyrm/models/book.py
index 7ec330da..7a652832 100644
--- a/bookwyrm/models/book.py
+++ b/bookwyrm/models/book.py
@@ -70,30 +70,30 @@ class Book(ActivitypubMixin, BookWyrmModel):
         ActivityMapping('id', 'remote_id'),
 
         ActivityMapping('authors', 'ap_authors'),
-        ActivityMapping('first_published_date', 'first_published_date'),
-        ActivityMapping('published_date', 'published_date'),
+        ActivityMapping('firstPublishedDate', 'firstpublished_date'),
+        ActivityMapping('publishedDate', 'published_date'),
 
         ActivityMapping('title', 'title'),
-        ActivityMapping('sort_title', 'sort_title'),
+        ActivityMapping('sortTitle', 'sort_title'),
         ActivityMapping('subtitle', 'subtitle'),
         ActivityMapping('description', 'description'),
         ActivityMapping('languages', 'languages'),
         ActivityMapping('series', 'series'),
-        ActivityMapping('series_number', 'series_number'),
+        ActivityMapping('seriesNumber', 'series_number'),
         ActivityMapping('subjects', 'subjects'),
-        ActivityMapping('subject_places', 'subject_places'),
+        ActivityMapping('subjectPlaces', 'subject_places'),
 
-        ActivityMapping('openlibrary_key', 'openlibrary_key'),
-        ActivityMapping('librarything_key', 'librarything_key'),
-        ActivityMapping('goodreads_key', 'goodreads_key'),
+        ActivityMapping('openlibraryKey', 'openlibrary_key'),
+        ActivityMapping('librarythingKey', 'librarything_key'),
+        ActivityMapping('goodreadsKey', 'goodreads_key'),
 
         ActivityMapping('work', 'ap_parent_work'),
-        ActivityMapping('isbn_10', 'isbn_10'),
-        ActivityMapping('isbn_13', 'isbn_13'),
-        ActivityMapping('oclc_number', 'oclc_number'),
+        ActivityMapping('isbn10', 'isbn_10'),
+        ActivityMapping('isbn13', 'isbn_13'),
+        ActivityMapping('oclcNumber', 'oclc_number'),
         ActivityMapping('asin', 'asin'),
         ActivityMapping('pages', 'pages'),
-        ActivityMapping('physical_format', 'physical_format'),
+        ActivityMapping('physicalFormat', 'physical_format'),
         ActivityMapping('publishers', 'publishers'),
 
         ActivityMapping('lccn', 'lccn'),