[books] Fix book admin

vrobbler/apps/books/admin.py

@@ -1,7 +1,5 @@
+from books.models import Author, Book, Paper
 from django.contrib import admin
-
-from books.models import Author, Book, Page
-
 from scrobbles.admin import ScrobbleInline
 
 
@@ -18,13 +16,6 @@ class AuthorAdmin(admin.ModelAdmin):
     search_fields = ("name",)
 
 
-@admin.register(Page)
-class PageAdmin(admin.ModelAdmin):
-    date_hierarchy = "created"
-    list_filter = ("book",)
-    ordering = ("book", "number")
-
-
 @admin.register(Book)
 class BookAdmin(admin.ModelAdmin):
     date_hierarchy = "created"
@@ -40,3 +31,20 @@ class BookAdmin(admin.ModelAdmin):
     inlines = [
         ScrobbleInline,
     ]
+
+
+@admin.register(Paper)
+class BookAdmin(admin.ModelAdmin):
+    date_hierarchy = "created"
+    list_display = (
+        "title",
+        "subtitle",
+        "arxiv_id",
+        "first_publish_year",
+        "pages",
+    )
+    search_fields = ("name",)
+    ordering = ("-created",)
+    inlines = [
+        ScrobbleInline,
+    ]