diff --git a/README.md b/README.md
index 1198b49..2140239 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,24 @@
+# to do
+
+Recupérer le isbn
+Valider la chaine de caractere au format
+lancer la requete sur le service
+	prioriser l'ordre des services
+	Mapping général pour lier plusieurs service
+Stocker les résultats sous forme de carte
+Avoir un uuid pour livre physisque
+dédoublon a l'ajout
+interface graphique
+
+
+
+
 # library
 
+ISBN :International Standard Book Number
+
+ISBN13 = <xxx>&<ISBN10>
+
+## Data Source
+###BNF
+http://catalogue.bnf.fr/api/test.do
diff --git a/shard.yml b/shard.yml
new file mode 100644
index 0000000..be81281
--- /dev/null
+++ b/shard.yml
@@ -0,0 +1,15 @@
+name: library
+version: 0.0.1
+
+
+dependencies:
+    dodb:
+        git: https://git.baguette.netlib.re/Baguette/dodb.cr
+        branch: master
+
+targets:
+  library:
+    main: src/main.cr
+
+
+
diff --git a/src/main.cr b/src/main.cr
index 637fbdc..217558a 100644
--- a/src/main.cr
+++ b/src/main.cr
@@ -2,6 +2,13 @@ require "json"
 # This will check if the ISBN is valid
 # https://en.wikipedia.org/wiki/International_Standard_Book_Number#Check_digits
 
+
+# get data from inventaire.io
+url =  "https://inventaire.io/api/entities?action=by-uris&uris=isbn%3A#{isbn}&refresh=false"
+
+
+
+
 a = "978-0-306-40615"
 b = "12-31231 23.1aa"
 c = "0-306-406v155"
diff --git a/src/storage.cr b/src/storage.cr
new file mode 100644
index 0000000..c607ee8
--- /dev/null
+++ b/src/storage.cr
@@ -0,0 +1,15 @@
+require "json"
+require "uuid"
+require "uuid/json"
+
+require "dodb"
+
+require "./storage/*"
+
+class Library::Storage
+	getter books                   : DODB::DataBase(Book)
+
+	def initialize(@root : String)
+		@books                   = DODB::DataBase(Book).new "#{@root}/books"
+	end
+end
diff --git a/src/storage/book.cr b/src/storage/book.cr
new file mode 100644
index 0000000..606716b
--- /dev/null
+++ b/src/storage/book.cr
@@ -0,0 +1,23 @@
+require "json"
+require "uuid"
+require "uuid/json"
+
+
+class Library::Book
+
+	property id              : UUID
+	property title           : String
+	property description     : String?
+	property added_time      : Time
+	property image_url      : String?
+	property authors           : Array(String)
+
+	def initialize(
+		@title                 ,
+		@added_time            = Time.local 
+		@id                    = UUID.random
+		@image_url             = nil,
+		@description           = nil
+	)
+	end
+end