diff --git a/fedireads/activitypub/status.py b/fedireads/activitypub/status.py
index 1f3a7f6f8..2e214e7cb 100644
--- a/fedireads/activitypub/status.py
+++ b/fedireads/activitypub/status.py
@@ -1,7 +1,7 @@
 ''' status serializers '''
 def get_review(review):
     ''' fedireads json for book reviews '''
-    status = get_status_json(review)
+    status = get_status(review)
     status['inReplyTo'] = review.book.absolute_id
     status['fedireadsType'] = review.status_type,
     status['name'] = review.name
diff --git a/fedireads/forms.py b/fedireads/forms.py
index 5a5948be8..75bc56ab2 100644
--- a/fedireads/forms.py
+++ b/fedireads/forms.py
@@ -40,8 +40,17 @@ class ReviewForm(ModelForm):
         }
 
 
+class CommentForm(ModelForm):
+    class Meta:
+        model = models.Status
+        fields = ['content']
+        help_texts = {f: None for f in fields}
+        labels = {'content': 'Comment'}
+
+
 class EditUserForm(ModelForm):
     class Meta:
         model = models.User
         fields = ['avatar', 'name', 'summary']
         help_texts = {f: None for f in fields}
+
diff --git a/fedireads/incoming.py b/fedireads/incoming.py
index 0210ddec1..579e0d3ba 100644
--- a/fedireads/incoming.py
+++ b/fedireads/incoming.py
@@ -14,6 +14,7 @@ from fedireads import models
 from fedireads import outgoing
 from fedireads.status import create_review, create_status
 from fedireads.remote_user import get_or_create_remote_user
+from fedireads.settings import DOMAIN
 
 
 @csrf_exempt
@@ -133,6 +134,34 @@ def get_status(request, username, status_id):
     return JsonResponse(activitypub.get_status(status))
 
 
+@csrf_exempt
+def get_replies(request, username, status_id):
+    ''' ordered collection of replies to a status '''
+    if request.method != 'GET':
+        return HttpResponseBadRequest()
+
+    replies = models.Status.objects.filter(
+        reply_parent=status_id
+    ).first()
+
+    path_id = 'https://%s/user/%s/status/%s/replies' % \
+        (DOMAIN, username, status_id)
+    replies_activity = {
+        '@context': 'https://www.w3.org/ns/activitystreams',
+        'id': path_id,
+        'type': 'Collection',
+        'first': {
+            'id': '%s?page=true' % path_id,
+            'type': 'CollectionPage',
+            'next': '%s?only_other_accounts=true&page=true' % path_id,
+            'partOf': path_id,
+            'items': [replies.activity]
+        }
+    }
+    return JsonResponse(replies_activity)
+
+
+
 @csrf_exempt
 def get_followers(request, username):
     ''' return a list of followers for an actor '''
diff --git a/fedireads/outgoing.py b/fedireads/outgoing.py
index 53baa592f..86326f137 100644
--- a/fedireads/outgoing.py
+++ b/fedireads/outgoing.py
@@ -4,9 +4,9 @@ from django.views.decorators.csrf import csrf_exempt
 import requests
 from urllib.parse import urlencode
 
+from fedireads import activitypub
 from fedireads import models
 from fedireads.status import create_review, create_status
-from fedireads import activitypub
 from fedireads.remote_user import get_or_create_remote_user
 from fedireads.broadcast import get_recipients, broadcast
 
@@ -135,3 +135,14 @@ def handle_review(user, book, name, content, rating):
     recipients = get_recipients(user, 'public')
     broadcast(user, create_activity, recipients)
 
+
+def handle_comment(user, review, content):
+    ''' post a review '''
+    # validated and saves the comment in the database so it has an id
+    comment = create_status(user, content, reply_parent=review)
+    comment_activity = activitypub.get_status(comment)
+    create_activity = activitypub.get_create(user, comment_activity)
+
+    recipients = get_recipients(user, 'public')
+    broadcast(user, create_activity, recipients)
+
diff --git a/fedireads/status.py b/fedireads/status.py
index ad30319ea..2114e94d7 100644
--- a/fedireads/status.py
+++ b/fedireads/status.py
@@ -9,10 +9,7 @@ def create_review(user, possible_book, name, content, rating):
     # throws a value error if the book is not found
     book = get_or_create_book(possible_book)
 
-    # sanitize review html
-    parser = InputHtmlParser()
-    parser.feed(content)
-    content = parser.get_output()
+    content = sanitize(content)
 
     # no ratings outside of 0-5
     rating = rating if 0 <= rating <= 5 else 0
@@ -41,8 +38,15 @@ def create_status(user, content, reply_parent=None, mention_books=None):
         reply_parent=reply_parent,
     )
 
-    for book in mention_books:
-        status.mention_books.add(book)
+    if mention_books:
+        for book in mention_books:
+            status.mention_books.add(book)
 
     return status
 
+
+def sanitize(content):
+    ''' remove invalid html from free text '''
+    parser = InputHtmlParser()
+    parser.feed(content)
+    return parser.get_output()
diff --git a/fedireads/templates/feed.html b/fedireads/templates/feed.html
index 9fb3d1e96..f18e107a8 100644
--- a/fedireads/templates/feed.html
+++ b/fedireads/templates/feed.html
@@ -66,7 +66,15 @@
                 <p>{{ activity.rating | stars }}</p>
                 <p>{{ activity.content | safe }}</p>
             </div>
-            <div class="interaction"><button>⭐️ Like</button></div>
+            <div class="interaction">
+                <button>⭐️ Like</button>
+                <form name="comment" action="/comment" method="post">
+                    {% csrf_token %}
+                    <input type="hidden" name="review" value="{{ activity.id }}"></input>
+                    {{ comment_form.content }}
+                    <button type="submit">Comment</button>
+                </form>
+            </div>
         {% elif activity.status_type == 'Note' %}
             posted</h2>
             {{ activity.content | safe }}
diff --git a/fedireads/urls.py b/fedireads/urls.py
index a601b644f..b0ff24a55 100644
--- a/fedireads/urls.py
+++ b/fedireads/urls.py
@@ -24,7 +24,10 @@ urlpatterns = [
         r'^user/(?P<username>\w+)/(status|review)/(?P<status_id>\d+)/activity/?$',
         incoming.get_status
     ),
-    re_path(r'^user/(?P<username>\w+)/(status|review)/?$', incoming.get_following),
+    re_path(
+        r'^user/(?P<username>\w+)/(status|review)/(?P<status_id>\d+)/replies/?$',
+        incoming.get_replies
+    ),
     # TODO: shelves need pages in the UI and for their activitypub Collection
 
     # .well-known endpoints
@@ -47,6 +50,7 @@ urlpatterns = [
 
     # internal action endpoints
     re_path(r'^review/?$', views.review),
+    re_path(r'^comment/?$', views.comment),
     re_path(
         r'^shelve/(?P<username>\w+)/(?P<shelf_id>[\w-]+)/(?P<book_id>\d+)/?$',
         views.shelve
diff --git a/fedireads/views.py b/fedireads/views.py
index 74e5a2a53..c68b75f0c 100644
--- a/fedireads/views.py
+++ b/fedireads/views.py
@@ -43,6 +43,7 @@ def home(request):
         '-created_date'
     )[:10]
 
+    comment_form = forms.CommentForm()
     data = {
         'user': request.user,
         'reading': reading,
@@ -50,6 +51,7 @@ def home(request):
         'recent_books': recent_books,
         'user_books': user_books,
         'activities': activities,
+        'comment_form': comment_form,
     }
     return TemplateResponse(request, 'feed.html', data)
 
@@ -250,6 +252,18 @@ def review(request):
     return redirect('/book/%s' % book_identifier)
 
 
+def comment(request):
+    ''' respond to a book review '''
+    form = forms.CommentForm(request.POST)
+    # this is a bit of a formality, the form is just one text field
+    if not form.is_valid():
+        return redirect('/')
+    review_id = request.POST['review']
+    parent = models.Review.objects.get(id=review_id)
+    outgoing.handle_comment(request.user, parent, form.data['content'])
+    return redirect('/')
+
+
 @login_required
 def follow(request):
     ''' follow another user, here or abroad '''