diff --git a/manuels/migrations/0001_initial.py b/manuels/migrations/0001_initial.py
index e5f8eaf..80868e1 100644
--- a/manuels/migrations/0001_initial.py
+++ b/manuels/migrations/0001_initial.py
@@ -1,4 +1,4 @@
-# Generated by Django 2.0.5 on 2018-05-21 21:57
+# Generated by Django 2.0.5 on 2018-05-21 22:47
 
 from django.db import migrations, models
 import django.db.models.deletion
@@ -50,8 +50,8 @@ class Migration(migrations.Migration):
                 ('uuid', models.UUIDField(default=uuid.uuid4, editable=False, primary_key=True, serialize=False)),
                 ('first_name', models.CharField(max_length=100, verbose_name='prénom')),
                 ('last_name', models.CharField(max_length=100, verbose_name='nom')),
-                ('phone_number', models.CharField(max_length=10, verbose_name='numéro de téléphone')),
-                ('email', models.EmailField(max_length=254, verbose_name='adresse email')),
+                ('phone_number', models.CharField(help_text="En cas d'urgence", max_length=10, verbose_name='numéro de téléphone')),
+                ('email', models.EmailField(help_text='Utilisée pour vous transmettre votre lien personnel', max_length=254, unique=True, verbose_name='adresse email')),
             ],
             options={
                 'verbose_name': 'enseignant',
diff --git a/manuels/models.py b/manuels/models.py
index ede35ed..45bb974 100644
--- a/manuels/models.py
+++ b/manuels/models.py
@@ -12,8 +12,12 @@ class Teacher(models.Model):
     uuid = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
     first_name = models.CharField('prénom', max_length=100)
     last_name = models.CharField('nom', max_length=100)
-    phone_number = models.CharField('numéro de téléphone', max_length=10)
-    email = models.EmailField('adresse email')
+    phone_number = models.CharField('numéro de téléphone', help_text="En cas d'urgence", max_length=10)
+    email = models.EmailField(
+        'adresse email',
+        help_text='Utilisée pour vous transmettre votre lien personnel',
+        unique=True
+    )
 
     def get_absolute_url(self):
         from django.urls import reverse
diff --git a/manuels/templates/manuels/add_book.html b/manuels/templates/manuels/add_book.html
index 84a1a3d..bb7853f 100644
--- a/manuels/templates/manuels/add_book.html
+++ b/manuels/templates/manuels/add_book.html
@@ -6,12 +6,15 @@
     <div class="row">
         <div class="col-12">
             <h1>Bienvenue {{ teacher.full_name }}</h1>
-            <h2>{% block title %}Ajouter un livre{% endblock %}</h2>
+            <h2>
+                {% block title %}Ajouter un livre{% endblock %}
+                <a href="{% url 'list_books' teacher.pk %}" class="btn btn-secondary">Retour à la liste</a>
+            </h2>
             <form action="" method="post" class="form">
                 {% csrf_token %}
                 {% bootstrap_form form %}
                 {% buttons %}
-                    <button type="submit" class="btn btn-primary">Submit</button>
+                    <button type="submit" class="btn btn-primary">Valider</button>
                 {% endbuttons %}
             </form>
         </div>
diff --git a/manuels/templates/manuels/home_page.html b/manuels/templates/manuels/home_page.html
index 9251097..5c3475e 100644
--- a/manuels/templates/manuels/home_page.html
+++ b/manuels/templates/manuels/home_page.html
@@ -27,7 +27,7 @@
                 {% csrf_token %}
                 {% bootstrap_form form %}
                 {% buttons %}
-                    <button type="submit" class="btn btn-primary">Submit</button>
+                    <button type="submit" class="btn btn-primary">Valider</button>
                 {% endbuttons %}
             </form>
         </div>
diff --git a/manuels/templates/manuels/list_books.html b/manuels/templates/manuels/list_books.html
index 9ab92b4..76a8d16 100644
--- a/manuels/templates/manuels/list_books.html
+++ b/manuels/templates/manuels/list_books.html
@@ -20,8 +20,9 @@
     </div>
     <div class="row">
         <div class="col-12">
-            <h2>{% block title %}Liste des livres demandés{% endblock %} <a href="{% url 'add_book' pk=teacher.pk %}"
-                                                                            class="btn btn-primary">Ajouter un livre</a>
+            <h2>
+                {% block title %}Liste des livres demandés{% endblock %}
+                <a href="{% url 'add_book' pk=teacher.pk %}" class="btn btn-primary">Ajouter un livre</a>
             </h2>
             <table class="table table-hover table-sm">
                 <thead>