diff --git a/addon/adapter.js b/addon/adapter.js
index 3f0e4d4..8af877e 100644
--- a/addon/adapter.js
+++ b/addon/adapter.js
@@ -36,4 +36,18 @@ export default DS.JSONAPIAdapter.extend({
 
     return this.ajax(url, 'GET', { data: query });
   },
+
+  findMany(store, type, ids, snapshots) {
+    const url = this.buildURL(type.modelName, ids, snapshots, 'findMany');
+    const filter = {
+      c: {
+        condition: {
+          path: 'uuid',
+          operator: 'IN',
+          value: ids
+        }
+      }
+    };
+    return this.ajax(url, 'GET', { data: { filter: filter } });
+  },
 });
diff --git a/addon/serializer.js b/addon/serializer.js
index 822dfb6..08e5930 100644
--- a/addon/serializer.js
+++ b/addon/serializer.js
@@ -65,6 +65,11 @@ const DrupalJSONAPISerializer = JSONAPISerializer.extend({
     }
     return relationships;
   },
+
+  keyForRelationship(key) {
+    // Prevent dash-ification of underscores in relationship keys
+    return key;
+  },
 });
 
-export default DrupalJSONAPISerializer;
\ No newline at end of file
+export default DrupalJSONAPISerializer;