diff --git a/manuels/admin.py b/manuels/admin.py
index 26226e1..0bdc621 100644
--- a/manuels/admin.py
+++ b/manuels/admin.py
@@ -18,6 +18,18 @@ class BookAdmin(admin.ModelAdmin):
     list_display = ['title', 'authors', 'editor', 'collection', 'publication_year', 'isbn',
                     'price', 'previously_acquired', 'teacher', 'level', 'field']
     list_filter = ['editor', 'previously_acquired', 'teacher', 'level']
+    fieldsets = [
+        ('Infos livre', {
+            'fields': ('title', 'authors', 'editor', 'collection', 'publication_year', 'isbn', 'created_at', 'updated_at')
+        }),
+        ('Élève', {
+            'fields': ('price', 'previously_acquired',)
+        }),
+        ('Enseignant', {
+            'fields': ('teacher', 'level', 'field')
+        }),
+    ]
+    readonly_fields = ['created_at', 'updated_at']
 
 
 @admin.register(Editor)
diff --git a/manuels/migrations/0003_auto_20180522_0145.py b/manuels/migrations/0003_auto_20180522_0145.py
new file mode 100644
index 0000000..5e80aec
--- /dev/null
+++ b/manuels/migrations/0003_auto_20180522_0145.py
@@ -0,0 +1,58 @@
+# Generated by Django 2.0.5 on 2018-05-21 23:45
+
+from django.db import migrations, models
+import django.utils.timezone
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('manuels', '0002_auto_20180522_0132'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='book',
+            name='created_at',
+            field=models.DateTimeField(auto_now_add=True, default=django.utils.timezone.now),
+            preserve_default=False,
+        ),
+        migrations.AddField(
+            model_name='book',
+            name='updated_at',
+            field=models.DateTimeField(auto_now=True),
+        ),
+        migrations.AddField(
+            model_name='editor',
+            name='created_at',
+            field=models.DateTimeField(auto_now_add=True, default=django.utils.timezone.now),
+            preserve_default=False,
+        ),
+        migrations.AddField(
+            model_name='editor',
+            name='updated_at',
+            field=models.DateTimeField(auto_now=True),
+        ),
+        migrations.AddField(
+            model_name='level',
+            name='created_at',
+            field=models.DateTimeField(auto_now_add=True, default=django.utils.timezone.now),
+            preserve_default=False,
+        ),
+        migrations.AddField(
+            model_name='level',
+            name='updated_at',
+            field=models.DateTimeField(auto_now=True),
+        ),
+        migrations.AddField(
+            model_name='teacher',
+            name='created_at',
+            field=models.DateTimeField(auto_now_add=True, default=django.utils.timezone.now),
+            preserve_default=False,
+        ),
+        migrations.AddField(
+            model_name='teacher',
+            name='updated_at',
+            field=models.DateTimeField(auto_now=True),
+        ),
+    ]
diff --git a/manuels/migrations/0004_auto_20180522_0148.py b/manuels/migrations/0004_auto_20180522_0148.py
new file mode 100644
index 0000000..37a7a02
--- /dev/null
+++ b/manuels/migrations/0004_auto_20180522_0148.py
@@ -0,0 +1,53 @@
+# Generated by Django 2.0.5 on 2018-05-21 23:48
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('manuels', '0003_auto_20180522_0145'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='book',
+            name='created_at',
+            field=models.DateTimeField(auto_now_add=True, verbose_name='créé le'),
+        ),
+        migrations.AlterField(
+            model_name='book',
+            name='updated_at',
+            field=models.DateTimeField(auto_now=True, verbose_name='mis à jour le'),
+        ),
+        migrations.AlterField(
+            model_name='editor',
+            name='created_at',
+            field=models.DateTimeField(auto_now_add=True, verbose_name='créé le'),
+        ),
+        migrations.AlterField(
+            model_name='editor',
+            name='updated_at',
+            field=models.DateTimeField(auto_now=True, verbose_name='mis à jour le'),
+        ),
+        migrations.AlterField(
+            model_name='level',
+            name='created_at',
+            field=models.DateTimeField(auto_now_add=True, verbose_name='créé le'),
+        ),
+        migrations.AlterField(
+            model_name='level',
+            name='updated_at',
+            field=models.DateTimeField(auto_now=True, verbose_name='mis à jour le'),
+        ),
+        migrations.AlterField(
+            model_name='teacher',
+            name='created_at',
+            field=models.DateTimeField(auto_now_add=True, verbose_name='créé le'),
+        ),
+        migrations.AlterField(
+            model_name='teacher',
+            name='updated_at',
+            field=models.DateTimeField(auto_now=True, verbose_name='mis à jour le'),
+        ),
+    ]
diff --git a/manuels/models.py b/manuels/models.py
index 6c35fa4..ddf5846 100644
--- a/manuels/models.py
+++ b/manuels/models.py
@@ -5,7 +5,14 @@ from django.core.exceptions import ValidationError
 from django.db import models
 
 
-class Teacher(models.Model):
+class BaseModel(models.Model):
+    class Meta:
+        abstract = True
+    created_at = models.DateTimeField('créé le', auto_now_add=True)
+    updated_at = models.DateTimeField('mis à jour le', auto_now=True)
+
+
+class Teacher(BaseModel):
     class Meta:
         verbose_name = 'enseignant'
         verbose_name_plural = 'enseignants'
@@ -31,7 +38,7 @@ class Teacher(models.Model):
         return self.full_name
 
 
-class Level(models.Model):
+class Level(BaseModel):
     class Meta:
         verbose_name = 'classe'
         verbose_name_plural = 'classes'
@@ -41,7 +48,7 @@ class Level(models.Model):
         return self.name
 
 
-class Editor(models.Model):
+class Editor(BaseModel):
     class Meta:
         verbose_name = 'éditeur'
         verbose_name_plural = 'éditeurs'
@@ -57,7 +64,7 @@ def isbn_validator(value):
         raise ValidationError("%(value)s n'est pas un ISBN valide.", params={'value': value})
 
 
-class Book(models.Model):
+class Book(BaseModel):
     class Meta:
         verbose_name = 'livre'
         verbose_name_plural = 'livres'