diff --git a/lib/decentralised_book_index/metadata.ex b/lib/decentralised_book_index/metadata.ex
index c5895f0..deca3d1 100644
--- a/lib/decentralised_book_index/metadata.ex
+++ b/lib/decentralised_book_index/metadata.ex
@@ -46,11 +46,11 @@ defmodule DecentralisedBookIndex.Metadata do
     resource DecentralisedBookIndex.Metadata.Author do
       define :create_author,
         action: :create,
-        args: [:name, :description, {:optional, :author_alias_registry_id}]
+        args: [:name, :description, {:optional, :avatar_url}, {:optional, :author_alias_registry_id}]
 
       define :add_author_to_related_alias_registry,
         action: :add_author_to_related_alias_registry,
-        args: [:name, :description, :related_author_id]
+        args: [:name, :description, :related_author_id, {:optional, :avatar_url}]
 
       define :list_authors, action: :read
       define :get_author_by_id, args: [:id], action: :by_id
diff --git a/lib/decentralised_book_index/metadata/author.ex b/lib/decentralised_book_index/metadata/author.ex
index bcd121c..b8b392f 100644
--- a/lib/decentralised_book_index/metadata/author.ex
+++ b/lib/decentralised_book_index/metadata/author.ex
@@ -22,7 +22,7 @@ defmodule DecentralisedBookIndex.Metadata.Author do
 
     create :create do
       primary? true
-      accept [:name, :description, :author_alias_registry_id]
+      accept [:name, :description, :avatar_url, :author_alias_registry_id]
 
       change fn changeset, _ ->
         registry_id = Ash.Changeset.get_attribute(changeset, :author_alias_registry_id)
@@ -38,7 +38,7 @@ defmodule DecentralisedBookIndex.Metadata.Author do
     end
 
     create :add_author_to_related_alias_registry do
-      accept [:name, :description]
+      accept [:name, :description, :avatar_url]
 
       argument :related_author_id, :uuid do
         allow_nil? false
@@ -63,7 +63,7 @@ defmodule DecentralisedBookIndex.Metadata.Author do
     end
 
     create :sync do
-      accept [:id, :name, :description, :dbi_server_id, :author_alias_registry_id]
+      accept [:id, :name, :description, :avatar_url, :dbi_server_id, :author_alias_registry_id]
 
       change fn changeset, _ ->
         server_id = Ash.Changeset.get_attribute(changeset, :dbi_server)
diff --git a/lib/decentralised_book_index/sync/data_transformers/author_transformer.ex b/lib/decentralised_book_index/sync/data_transformers/author_transformer.ex
index 07ec8bd..6333ec6 100644
--- a/lib/decentralised_book_index/sync/data_transformers/author_transformer.ex
+++ b/lib/decentralised_book_index/sync/data_transformers/author_transformer.ex
@@ -9,12 +9,14 @@ defmodule DecentralisedBookIndex.Sync.DataTransformers.AuthorTransformer do
           id: get_in(json_body, ["data", "id"]),
           name: get_in(json_body, ["data", "attributes", "name"]),
           description: get_in(json_body, ["data", "attributes", "description"]),
+          avatar_url: get_in(json_body, ["data", "attributes", "avatar_url"]),
         }
       else
         %{
           id: get_in(json_body, ["id"]),
           name: get_in(json_body, ["attributes", "name"]),
           description: get_in(json_body, ["attributes", "description"]),
+          avatar_url: get_in(json_body, ["attributes", "avatar_url"]),
         }
       end
 
diff --git a/test/decentralised_book_index/metadata/author_test.exs b/test/decentralised_book_index/metadata/author_test.exs
index cb26398..65a84da 100644
--- a/test/decentralised_book_index/metadata/author_test.exs
+++ b/test/decentralised_book_index/metadata/author_test.exs
@@ -11,7 +11,7 @@ defmodule DecentralisedBookIndex.Metadata.AuthorTest do
 
     test "a new author belongs to a registry if specified" do
       assert {:ok, registry} = Metadata.create_author_alias_registry()
-      assert {:ok, author} = Metadata.create_author("Author", "An description", registry.id)
+      assert {:ok, author} = Metadata.create_author("Author", "An description", nil, registry.id)
       assert author.author_alias_registry_id == registry.id
     end
 
@@ -70,4 +70,18 @@ defmodule DecentralisedBookIndex.Metadata.AuthorTest do
       assert alias2.id in ids
     end
   end
+
+  describe "authors and avatar_url" do
+    test "a new author has no avatar by default" do
+      assert {:ok, author} = Metadata.create_author("Author", "An description")
+      assert author.avatar_url == nil
+    end
+
+    test "a new author has a avatar" do
+      avatar_url = "/images/avatar.png"
+
+      assert {:ok, author} = Metadata.create_author("Author", "An description", avatar_url)
+      assert author.avatar_url == avatar_url
+    end
+  end
 end
diff --git a/test/decentralised_book_index/sync/data_transformers/author_transformer_test.exs b/test/decentralised_book_index/sync/data_transformers/author_transformer_test.exs
index 701511e..10aff66 100644
--- a/test/decentralised_book_index/sync/data_transformers/author_transformer_test.exs
+++ b/test/decentralised_book_index/sync/data_transformers/author_transformer_test.exs
@@ -8,7 +8,7 @@ defmodule DecentralisedBookIndex.Sync.DataTransformers.AuthorTransformerTest do
     test "a json contains correct author information" do
       json_body = %{
         "data" => %{
-          "attributes" => %{"description" => "Something", "name" => "Author"},
+          "attributes" => %{"description" => "Something", "name" => "Author", "avatar_url" => "/images/avatar.png"},
           "id" => "889a323e-d104-4b5d-b276-dad5a9b1da9d",
           "links" => %{},
           "meta" => %{},
@@ -26,13 +26,14 @@ defmodule DecentralisedBookIndex.Sync.DataTransformers.AuthorTransformerTest do
       assert %{
         id: "889a323e-d104-4b5d-b276-dad5a9b1da9d",
         name: "Author",
-        description: "Something"
+        description: "Something",
+        avatar_url: "/images/avatar.png"
       } = author
     end
 
     test "a json doesn't contains author information \"data\" attribute" do
       json_body = %{
-        "attributes" => %{"description" => "Something", "name" => "Author"},
+        "attributes" => %{"description" => "Something", "name" => "Author", "avatar_url" => "/images/avatar.png"},
         "id" => "889a323e-d104-4b5d-b276-dad5a9b1da9d",
         "links" => %{},
         "meta" => %{},
@@ -44,7 +45,8 @@ defmodule DecentralisedBookIndex.Sync.DataTransformers.AuthorTransformerTest do
       assert %{
         id: "889a323e-d104-4b5d-b276-dad5a9b1da9d",
         name: "Author",
-        description: "Something"
+        description: "Something",
+        avatar_url: "/images/avatar.png"
       } = author
     end
   end
diff --git a/test/decentralised_book_index/sync/sync/author_sync_test.exs b/test/decentralised_book_index/sync/sync/author_sync_test.exs
index eb70d55..3ff738e 100644
--- a/test/decentralised_book_index/sync/sync/author_sync_test.exs
+++ b/test/decentralised_book_index/sync/sync/author_sync_test.exs
@@ -16,6 +16,7 @@ defmodule DecentralisedBookIndex.Sync.DataTransformers.AuthorSyncTest do
         id: "889a323e-d104-4b5d-b276-dad5a9b1da9d",
         name: "Author",
         description: "Something",
+        avatar_url: "/images/avatar.png",
         author_alias_registry_id: nil
       }
 
@@ -24,6 +25,7 @@ defmodule DecentralisedBookIndex.Sync.DataTransformers.AuthorSyncTest do
 
       assert author.id == saved_author.id
       assert author.name == saved_author.name
+      assert author.avatar_url == saved_author.avatar_url
       assert nil != saved_author.author_alias_registry_id
       assert server.id == saved_author.dbi_server_id
     end
@@ -37,6 +39,7 @@ defmodule DecentralisedBookIndex.Sync.DataTransformers.AuthorSyncTest do
         id: author.id,
         name: "Author2",
         description: "Something2",
+        avatar_url: "/images/avatar.png",
         author_alias_registry_id: nil
       }
 
@@ -46,6 +49,7 @@ defmodule DecentralisedBookIndex.Sync.DataTransformers.AuthorSyncTest do
       assert author.id == saved_author.id
       assert author_attrs.name == saved_author.name
       assert author_attrs.description == saved_author.description
+      assert author_attrs.avatar_url == saved_author.avatar_url
     end
   end
 end